(Not a Comcast / Xfinity customer? Click your service provider tab above to find modems.)

Comcast (Xfinity) Approved DOCSIS 3.0 and 3.1 Cable Modems

Modem list updated November 2018. Prices updated every hour.

Below are all the modems on the Comcast Approved Cable Modem List which can be bought at Amazon, Walmart or Best Buy. There are over 70 different modems on that list and we've gone through all of them to find the ones that can be purchased at major retailers.

If you're paying $11 a month to rent a modem from Comcast, that's $132 a year or $660 over 5 years. You can buy a new one that will pay for itself in less than six months. Its easy to install. Just hookup modem, open web browser on attached computer and follow the on-screen instructions.

Comcast / Xfinity Triple Play or Voice customers: The modems listed immediately below will not work if you have Comcast/Xfinity Voice or Triple Play. To see modems that will work, read this: Comcast Voice Modems


DOCSIS 3.0 and DOCSIS 3.1 Cable Modems

Cable Modem Buying Tips and FAQ's

All of these modems below will work on all speed tiers: Economy, Performance, Blast, Extreme and Gigabit. However, in order to maximize your internet speed, customers with up to 100 Mbps plans should buy a modem with at least 8 downstream channels. For up to 250 Mbps plans, buy a modem with at least 16 downstream channels. For Gigabit service (1000 Mpbs), buy a DOCSIS 3.1 modem below, with 32 downstream channels.

Comcast / Xfinity business customers: See our Comcast Approved Modems for Business page for compatible modems.

All of these modems are high quality and have pretty much the same features, except for number of downstream channels and those with routers built in. So don't worry too much about deciding which one to buy. Price should be a main factor in your buying decision. Buy one now and start saving those rental fees!

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See all Comcast / Xfinity approved modems and compare prices and features in a sortable table: All Comcast / Xfinity Approved Modems: Price and Feature Comparison Table

Netgear CM500 DOCSIS 3.0 Cable Modem

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CM500
Netgear CM500 Specs

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The Netgear CM500 is currently one of the best selling modems and for a good reason. It has 16 downstream channels and 4 upstream, enough for most users.

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  • 4.2/5 (6,672 ratings counted at all sellers)

Sales Ranking*: 1

Motorola MG7540 DOCSIS 3.0 Cable Modem and AC-1600 WiFi Router

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MG7540
Motorola MG7540 Specs

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The Motorola MG7540 has a built-in AC-1600 router. Four gigabit ports with 16 downstream channels and 4 upstream. Look also at the MB7550, which has an AC-1900 router.

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  • 4.1/5 (964 ratings counted at all sellers)

Sales Ranking*: 6

ARRIS / Motorola SB6190 SURFBoard DOCSIS 3.0 Cable Modem

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SB6190
ARRIS SB6190 Specs

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The ARRIS / Motorola SB6190 has 32 downstream channels and 8 channels upstream. We don't recommend this modem as it has latency problems. See more about that here: Puma 6 Chipset. Take a look at these others: SB6183, TC-7650 and CM600

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  • 4.5/5 (2,903 ratings counted at all sellers)

Sales Ranking*: 4

Netgear Nighthawk DOCSIS 3.0 Cable Modem and AC-1900 WiFi Router (C7000)

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C7000
Netgear C7000 Specs

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The Netgear C7000 has an AC-1900 WiFi router built-in. It has 24 downstream channels and 8 upstream, plus a USB 2.0 port and 4 gigabit ethernet ports.

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  • 4.2/5 (9,925 ratings counted at all sellers)

Sales Ranking*: 2

Motorola MB8600 DOCSIS 3.1 Cable Modem

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MB8600
Motorola MB8600 Specs

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The Motorola MB8600 is a very popular DOCSIS 3.1 modem, compatible with DOCSIS 3.0 systems having 32 downstream channels and 8 upstream. It has one usable gigabit port, but has 3 others for WiFi channel bonding routers when they become available.

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  • 4.0/5 (718 ratings counted at all sellers)

Sales Ranking*: 7

ARRIS / Motorola SB6183 SURFBoard DOCSIS 3.0 Cable Modem

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SB6183
ARRIS SB6183 Specs

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The ARRIS / Motorola SB6183 is one of the latest versions in their Surfboard series. With 16 downstream channels and 4 upstream, it can handle all but the fastest internet plans. As the price of this modem has fallen, it's becoming one of the all-time popular modems.

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  • 4.5/5 (8,115 ratings counted at all sellers)

Sales Ranking*: 9

ARRIS SB8200 DOCSIS 3.1 Cable Modem

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SB8200
ARRIS SB8200 Specs

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The ARRIS SB6200 is a DOCSIS 3.1 modem for the fastest speeds available. Even if you don't have DOCSIS 3.1 service in your area yet, it will work on DOCSIS 3.0 plans and will really future proof if you get faster service. It has 2 Gigabit ports. For DOCSIS 3.0 plans, it has 32 downstream channels and 8 upstream.

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  • 4.0/5 (1,154 ratings counted at all sellers)

Sales Ranking*: 3

Netgear AC1750 Wireless-AC DOCSIS 3.0 Cable Modem Router (C6300)

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C6300
Netgear C6300 Specs

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The Netgear AC1750 has a built-in dual band wireless-AC1750 router. With 16 downstream channels, 4 upstream. It also has 4 Gigabit Ethernet ports and a USB 2.0 port. We don't recommend this modem as it has latency problems. See more about that here: Puma 6 Chipset

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  • 4.2/5 (9,884 ratings counted at all sellers)

Sales Ranking*: 23

Netgear CM700 DOCSIS 3.0 Cable Modem

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CM700
Netgear CM700 Specs

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The Netgear CM700 has 32 downstream channels and 8 upstream. We don't recommend this modem as it has latency problems. See more about that here: Puma 6 Chipset. Take a look at these others: SB6183, TC-7650 and CM600

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  • 4.2/5 (2,630 ratings counted at all sellers)

Sales Ranking*: 16

Motorola MB7420 DOCSIS 3.0 Cable Modem

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MB7420
Motorola MB7420 Specs

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The Motorola MB7420 is another quality modem with 16 downstream channels and 4 upstream. A faster version of this model with 24 downstream channels is the MB7621.

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  • 4.2/5 (1,914 ratings counted at all sellers)

Sales Ranking*: 11

Netgear N600 WiFi DOCSIS 3.0 Cable Modem Router (C3700)

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C3700
Netgear C3700 Specs

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The Netgear N600 has built-in dual band wireless-N600 router. If you have devices with dual band too, you can get exceptional WiFi speed. It also has 2 Gigabit Ethernet ports, a USB 2.0 port and 8 downstream channels, 4 upstream.

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  • 3.7/5 (8,747 ratings counted at all sellers)

Sales Ranking*: 14

SEE IT NOW AT:NEWUSED
Amazon $98.42
$42.00
Best Buy $98.99

ARRIS / Motorola SB6141 SURFBoard DOCSIS 3.0 Cable Modem

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SB6141
ARRIS SB6141 Specs

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The ARRIS / Motorola SB6141 has 8 downstream channels and 4 upstream. The newer version of the SB6141 is the SB6183, which has twice the maximum download speed of the SB6141.

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  • 4.4/5 (27,661 ratings counted at all sellers)

Sales Ranking*: 5

SEE IT NOW AT:NEWUSED
Amazon $44.98
$29.70
Best Buy $49.99

Netgear N300 WiFi DOCSIS 3.0 Cable Modem Router (C3000)

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C3000
Netgear C3000 Specs

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The Netgear N300 has a built-in wireless-N300 router. It has 2 Gigabit Ethernet ports plus a USB 2.0 port for attaching a network drive. 8 downstream channels and 4 upstream. The CG3000DV2 is basically this modem with a N450 router.

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  • 4.0/5 (7,062 ratings counted at all sellers)

Sales Ranking*: 8

SEE IT NOW AT:NEWUSED
Amazon $73.99
$29.99

Motorola MG7310 DOCSIS 3.0 Cable Modem and N300 WiFi Router

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MG7310
Motorola MG7310 Specs

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The Motorola MG7310 has a built-in N-300 router. Four gigabit ports with 8 downstream channels and 4 upstream. Look also at the MB7315, which has an N-450 router.

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  • 3.5/5 (443 ratings counted at all sellers)

Sales Ranking*: 45

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ARRIS SBG7580-AC DOCSIS 3.0 Cable Modem and AC-1750 Router

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SBG7580
ARRIS SBG7580 Specs

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The ARRIS SBG7580 is one of the faster modems with a built-in AC-1750 router and 4 Gigabit ethernet ports. It has 32 downstream channels and 8 upstream. One of the fastest DOCSIS 3.0 modems available.

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  • 3.6/5 (383 ratings counted at all sellers)

Sales Ranking*: 17

SEE IT NOW AT:NEWUSED
Amazon $179.99
$127.39
Best Buy $179.99

TP-Link TC-7610 DOCSIS 3.0 Cable Modem

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TC-7610
TP-Link TC-7610 Specs

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The TP-Link TC-7610 is a fast modem with 8 downstream channels and 4 upstream. Another version of this is the TC-7620, with 16 downstream channels.

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  • 4.1/5 (1,305 ratings counted at all sellers)

Sales Ranking*: 12

SEE IT NOW AT:NEWUSED
Amazon $39.98
$17.49

ASUS CM-32 DOCSIS 3.0 Cable Modem with AC2600 WiFi Router

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CM-32
ASUS CM-32 Specs

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The ASUS CM-32 has an AC-2600 WiFi router built-in and 32 downstream channels, enough speed for almost all internet plans. Also has 8 upstream channels, a USB 2.0 port and 4 gigabit ports.

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  • 3.7/5 (219 ratings counted at all sellers)

Sales Ranking*: 21

SEE IT NOW AT:NEWUSED
Amazon $223.19
$165.37

Netgear C6250 DOCSIS 3.0 Cable Modem with AC-1600 WiFi Router

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C6250
Netgear C6250 Specs

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The Netgear C6250 comes with an AC-1600 WiFi router built-in. It has a USB 2.0 port to add a network drive. 16 channels downstream and 4 upstream.

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  • 3.9/5 (6,371 ratings counted at all sellers)

Sales Ranking*: 33

SEE IT NOW AT:NEWUSED
Amazon $134.99
$94.99
Best Buy $134.99

Netgear Nighthawk X45 DOCSIS 3.1 Cable Modem and AC-3200 WiFi Router (C7800)

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C7800
Netgear C7800 Specs

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The Netgear C7800 is a DOCSIS 3.1 modem with a built-in AC-3200 WiFi router. It's compatible with DOCSIS 3.0 plans, with 32 downstream channels and 8 upstream. It also has 2 USB 3.0 ports. A super fast modem that will work on all internet plans.

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  • 4.0/5 (219 ratings counted at all sellers)

Sales Ranking*: 18

SEE IT NOW AT:NEWUSED
Amazon $329.99
$323.39
Best Buy $329.99

TP-Link TC-W7960 DOCSIS 3.0 Cable Modem with N300 WiFi Router

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TC-W7960
TP-Link TC-W7960 Specs

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The TP-Link TC-W7960 has a built-in N300 WiFi router. Comes with one USB 2.0 port, 4 gigabit ports and has 8 downstream channels and 4 upstream channels. You might want to check out the CR-500, with 16 downstream channels and an AC-1200 router.

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  • 3.0/5 (1,217 ratings counted at all sellers)

Sales Ranking*: 27

SEE IT NOW AT:NEWUSED
Amazon $56.65
$72.00
Walmart $56.65

TP-Link TC-7620 DOCSIS 3.0 Cable Modem

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TC-7620
TP-Link TC-7620 Specs

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The TP-Link TC-7620 is a fast modem with 16 downstream channels and 4 upstream. Another version of this is the TC-7650, with 24 downstream channels.

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  • 4.1/5 (591 ratings counted at all sellers)

Sales Ranking*: 20

SEE IT NOW AT:NEWUSED
Amazon $50.00
$36.50
Walmart $59.99

Netgear CM400 DOCSIS 3.0 Cable Modem

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CM400
Netgear CM400 Specs

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The Netgear CM400 has 8 downstream channels and 4 upstream. You might want to also check out the cm500,with 16 downstream channels and currently one of the best selling modems.

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  • 4.2/5 (2,499 ratings counted at all sellers)

Sales Ranking*: 26

TP-Link Archer CR700 DOCSIS 3.0 Cable Modem with AC1750 WiFi Router

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CR700
TP-Link CR700 Specs

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The TP-Link CR700 has a built-in AC-1750 WiFi router. Comes with 2 USB 2.0 ports, 4 gigabit ports and has 16 downstream channels and 4 upstream channels. Also take a peek at the CR1900, with 24 downstream channels and an AC-1900 router.

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  • 3.4/5 (763 ratings counted at all sellers)

Sales Ranking*: 31

ARRIS Surfboard SBG7400 DOCSIS 3.0 Cable Modem with AC2350 WiFi Router

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SBG7400
ARRIS SBG7400 Specs

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The ARRIS SBG7400 is a very fast modem with an AC-2350 WiFi router built-in. Comes with a USB 2.0 port and 24 downstream channels and 8 upstream.

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  • 4.2/5 (3,874 ratings counted at all sellers)

Sales Ranking*: 15

Motorola MG7550 DOCSIS 3.0 Cable Modem and AC-1900 WiFi Router

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MG7550
Motorola MG7550 Specs

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The Motorola MG7550 has a built-in AC-1900 router. Four gigabit ports with 16 downstream channels and 4 upstream.

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  • 4.3/5 (1,627 ratings counted at all sellers)

Sales Ranking*: 37

TP-Link TC7650 DOCSIS 3.0 Cable Modem

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TC-7650
TP-Link TC-7650 Specs

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The TP-Link TC-7650 is a fast modem with 24 downstream channels and 8 upstream. Fast enough for all internet plans except gigabit ones.

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  • 3.9/5 (225 ratings counted at all sellers)

Sales Ranking*: 19

SEE IT NOW AT:NEWUSED
Amazon $79.99
N/A
Walmart $79.99

Netgear C6220 DOCSIS 3.0 Cable Modem with AC-1200 Wifi Router

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C6220
Netgear C6220 Specs

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The Netgear C6220 comes with an AC-1200 WiFi router built-in. It has a USB 2.0 port to add a network drive. 8 channels downstream and 4 upstream. Look at the C6250, with 16 downstream channels and an AC-1600 router.

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  • 4.1/5 (2,462 ratings counted at all sellers)

Sales Ranking*: 30

Netgear CM1000 DOCSIS 3.1 Cable Modem

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CM1000
Netgear CM1000 Specs

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The Netgear CM1000 is a DOCSIS 3.1 modem. Compatiable with DOCSIS 3.0 plans, having 32 downstream channels and 8 upstream. One gigabit port.

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  • 4.3/5 (3,022 ratings counted at all sellers)

Sales Ranking*: 13

SEE IT NOW AT:NEWUSED
Amazon $152.53
$134.23
Best Buy $159.99

Linksys CG7500 DOCSIS 3.0 Cable Modem and AC-1900 WiFi Router

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CG7500
Linksys CG7500 Specs

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The LInksys CG7500 has a speedy AC-1900 WiFi router built-in. With 24 downstream channels and 8 upstream, it has plenty of speed for all but the gigabit speed plans.

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  • 3.8/5 (5,171 ratings counted at all sellers)

Sales Ranking*: 24

SEE IT NOW AT:NEWUSED
Amazon $94.35
$72.47
Best Buy $199.99

ARRIS SURFboard SBG6400 DOCSIS 3.0 Cable Modem with N300 Wi-Fi Router

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SBG6400
ARRIS SBG6400 Specs

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The ARRIS SBG6400 is an updated version of their very popular SBG6580. It has 8 downstream channels and 4 upstream. Comes with a N300 WiFi router built in and a USB 2.0 port to add a network drive.

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  • 2.8/5 (1,814 ratings counted at all sellers)

Sales Ranking*: 28

SEE IT NOW AT:NEWUSED
Amazon $39.89
$32.36

Netgear N450 WiFi DOCSIS 3.0 Cable Modem Router (CG3000Dv2)

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CG3000Dv2
Netgear CG3000Dv2 Specs

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The Netgear N450 has built-in wireless-N router, rated at 450 Mbps, faster than the Netgear C3000 which is rated at 300 Mbps. It has 4 Gigabit Ethernet ports and a USB 2.0 port. 8 downstream channels and 4 upstream. The C3700 is basically this modem with a N600 router, but only 2 Gigabit ports.

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  • 3.3/5 (2,038 ratings counted at all sellers)

Sales Ranking*: 25

SEE IT NOW AT:NEWUSED
Amazon $78.29
$28.94

TP-Link Archer CR1900 DOCSIS 3.0 Cable Modem with AC1900 WiFi Router

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CR1900
TP-Link CR1900 Specs

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The TP-Link CR1900 has a built-in AC-1900 WiFi router. Comes with 2 USB 2.0 ports, 4 gigabit ports and has 24 downstream channels and 8 upstream channels.

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  • 3.6/5 (35 ratings counted at all sellers)

Sales Ranking*: 49

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Motorola MG7315 DOCSIS 3.0 Cable Modem and N450 WiFi Router

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MG7315
Motorola MG7315 Specs

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The Motorola MG7315 has a built-in N-450 router. Four gigabit ports with 8 downstream channels and 4 upstream. Look also at the MB7310, which has an N-300 router.

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  • 4.2/5 (1,581 ratings counted at all sellers)

Sales Ranking*: 10

SEE IT NOW AT:NEWUSED
Amazon $99.99
$74.99
Best Buy $99.99

ARRIS Surfboard SBG6950 DOCSIS 3.0 Cable Modem with AC1900 WiFi Router

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SBG6950
ARRIS SBG6950 Specs

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The ARRIS SBG6950 is another fast modem with an AC-1900 WiFi router built-in. Comes with a USB 2.0 port and 16 downstream channels and 4 upstream. You might want to check out the SBG7400 with 24 downstream channels and an AC-2350 router.

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  • 4.2/5 (4,004 ratings counted at all sellers)

Sales Ranking*: 29

SEE IT NOW AT:NEWUSED
Amazon $159.99
$101.72
Best Buy $159.99

Motorola MB7621 DOCSIS 3.0 Cable Modem

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MB7621
Motorola MB7621 Specs

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The Motorola MB7621 is a speedy modem with 24 downstream channels and 8 upstream channels. A quality product.

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  • 4.2/5 (118 ratings counted at all sellers)

Sales Ranking*: 38

TP-Link Archer CR500 DOCSIS 3.0 Cable Modem with AC1200 WiFi Router

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CR500
TP-Link CR500 Specs

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The TP-Link CR500 has a built-in AC-1200 WiFi router. Comes with 2 USB 2.0 ports, 4 gigabit ports and has 16 downstream channels and 4 upstream channels. Also check out the CR700, with 16 downstream channels and an AC-1750 router.

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  • 4.1/5 (591 ratings counted at all sellers)

Sales Ranking*: 22

SEE IT NOW AT:NEWUSED
Amazon $109.99
$100.00
Walmart $114.39

Linksys CM3024 DOCSIS 3.0 Cable Modem

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CM3024
Linksys CM3024 Specs

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The Linksys CM3024 has 24 downstream channels and 8 upstream. We don't recommend this modem as it has latency problems. See more about that here: Puma 6 Chipset. Take a look at these others: SB6183, TC-7650 and CM600

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  • 3.9/5 (704 ratings counted at all sellers)

Sales Ranking*: 35

ASUS CM-16 DOCSIS 3.0 Cable Modem

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CM-16
ASUS CM-16 Specs

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The ASUS CM-16 has 16 downstream channels and 4 upstream, with one Gigabit ethernet port.

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  • 3.7/5 (219 ratings counted at all sellers)

Sales Ranking*: 39

SEE IT NOW AT:NEWUSED
Amazon $70.68
$40.92

NETGEAR C7500-100NAS Nighthawk X4 DOCSIS 3.0 Cable Modem with AC3200 WiFi Router

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C7500
Netgear C7500 Specs

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The Netgear C7500 is one of the fastest DOCSIS 3.0 modems available. Contains a built-in AC-3200 WiFi router and has 24 downstream channels and 8 upstream. Also includes a USB 2.0 port and 4 gigabit ports.

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  • 3.8/5 (5,171 ratings counted at all sellers)

Sales Ranking*: 41

SEE IT NOW AT:NEWUSED
Amazon $298.99
N/A
Best Buy $298.99

ARRIS Surfboard SBG10 Docsis 3.0 Cable Modem with AC1600 WiFi Router

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SBG10
ARRIS SBG10 Specs

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The ARRIS SBG10 modem has an AC-1600 WiFi Router. Only 2 gigabit ports on this model, but has 16 downstream channels and 4 upstream.

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  • 4.2/5 (3,873 ratings counted at all sellers)

Sales Ranking*: 32

SEE IT NOW AT:NEWUSED
Amazon $129.99
$107.91
Best Buy $119.99

Netgear CBR40 Orbi All-in-One Cable Modem with Whole Home Mesh-Ready AC2200 WiFi Router

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CBR40
Netgear CBR40 Specs

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The Netgear CBR-40 is a mesh network AC-2200 WiFi router for whole home coverage. The only one currently available. 24 downstream channels and 8 up for plenty of speed.

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  • 4.3/5 (94 ratings counted at all sellers)

Sales Ranking*: 42

SEE IT NOW AT:NEWUSED
Amazon $299.98
N/A

ARRIS / Motorola SBG6900-AC DOCSIS 3.0 Cable Modem with AC1900 Wi-Fi Router

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SBG6900
ARRIS SBG6900 Specs

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The ARRIS SBG6900 has a built-in wireless-AC1900 router, for the fast WIFI speeds. It also has 4 Gigabit ethernet ports. This is one of the faster modem/router combos that you can buy. 16 channels downstream, and 4-channel up. It also has a USB 2.0 port, so you can add a USB hard drive or flash drive and share files on the network.

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  • 4.5/5 (7,661 ratings counted at all sellers)

Sales Ranking*: 43

Motorola MB7220 DOCSIS 3.0 Cable Modem

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MB7220
Motorola MB7220 Specs

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The Motorola MB7220 is another quality modem with 8 downstream channels and 4 upstream. A faster version of this model with 16 downstream channels is the MB7420.

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  • 4.5/5 (843 ratings counted at all sellers)

Sales Ranking*: 40

Linksys CM3008 DOCSIS 3.0 Cable Modem

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CM3008
Linksys CM3008 Specs

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The Linksys CM3008 is a quality basic modem with 8 downstream channels and 4 upstream with one gigabit port.

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  • 3.9/5 (679 ratings counted at all sellers)

Sales Ranking*: 36

SEE IT NOW AT:NEWUSED
Amazon $37.78
$20.00
Walmart $59.99

ARRIS / Motorola SBG6700-AC DOCSIS 3.0 Cable Modem with AC1600 Wi-Fi Router

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SBG6700
ARRIS SBG6700 Specs

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The ARRIS SBG6700 has a built-in wireless-AC1600 router, for fast WIFI speeds. It also has 2 Gigabit Ethernet Ports. 8 downstream channels, and 4-channel up. A faster version of this is the SBG6900, with twice the maximum download speed and an AC1900 wireless router.

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  • 4.3/5 (8,450 ratings counted at all sellers)

Sales Ranking*: 44

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Netgear CM600 DOCSIS 3.0 Cable Modem

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CM600
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The Netgear CM600 is a DOCSIS 3.0 modem with 24 downstream channels and 8 upstream. It also has one gigabit port. A quality modem with enough speed for almost all internet plans.

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  • 4.1/5 (5,825 ratings counted at all sellers)

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ARRIS / Motorola SB6121 SURFboard DOCSIS 3.0 Cable Modem

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SB6121
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The ARRIS / Motorola SB6121 has 4 downstream channels and 4 upstream. Even though it will work, most cable companies suggest a minimum of 8 downstream channels. Take a look at the SB6141, which doesn't cost much more, or the SB6183.

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  • 4.5/5 (8,722 ratings counted at all sellers)

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Linksys CM3016 DOCSIS 3.0 Cable Modem

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CM3016
Linksys CM3016 Specs

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The Linksys CM3016 has 16 downstream channels and 4 upstream. We don't recommend this modem as it has latency problems. See more about that here: Puma 6 Chipset

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  • 3.9/5 (70 ratings counted at all sellers)

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Zoom Model 5370 DOCSIS 3.0 Cable Modem

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The Zoom 5370 DOCSIS 3.0 cable modem is a basic, quality modem with 16 downstream channels and 4 upstream.

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  • 4.4/5 (488 ratings counted at all sellers)

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Zoom Model 5345 DOCSIS 3.0 Cable Modem

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The Zoom 5345 DOCSIS 3.0 cable modem is another basic, quality modem with 8 downstream channels and 4 upstream.

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  • 4.3/5 (349 ratings counted at all sellers)

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ARRIS / Motorola SBG6580 SURFboard DOCSIS 3.0 Gateway Wireless Cable Modem

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SBG6580
ARRIS SBG6580 Specs

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The ARRIS / Motorola SBG6580 has a built-in dual band N300 router. It also has 4 Gigabit Ethernet Ports. 8 downstream channels, 4 upstream. The newer version is the SBG6700, which is a litter more, but has an AC-1600 router instead.

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SMC Networks D3CM1604 DOCSIS 3.0 Cable Modem

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D3CM1604
SMC D3CM1604 Specs

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The SMC Networks D3CM1604 is a DOCSIS 3.0 modem with 16 downstream channels and 4 upstream. Also has one gigabit ethernet port.

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  • 3.7/5 (164 ratings counted at all sellers)

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See all Comcast / Xfinity approved modems and compare prices and features in a sortable table: All Comcast / Xfinity Approved Modems: Price and Feature Comparison Table



Comcast Voice or Triple Play Customers:

You will need a cable modem called an EMTA or telephony modem. Not all Comcast regions let you buy your own EMTA modem. Call your local Comcast service center and check if they allow customer owned EMTA modems or check the Comcast Approved Cable Modem List and enter your zip code and select "Voice/Telephone enabled" on the lower left. If so, the following can be bought from Amazon (these links takes you to Amazon):

These are the only retail modems that will work with Comcast phone service.

If you don't need the built in WIFI router of the TG862G, you can put it in bridge mode and use your own WIFI router.

Another option is get rid of Comcast Voice and sign up with a voice over IP (VoIP) company such as Callcentric. For $3.45 per month plus 1.5 cents per minute (other pricing plans available), you can use your current phone number, get free voice mail, caller id, forward your messages to your email, automatic spam / telemarketing call blocking, message text alerts, block and forward certain calls, 911 service; all the features of Comcast Voice plus many more. Quality is as good as Comcast's. If you don't use your home phone much anymore, this is a great option. Now, you could buy your own modem and save even more per month. We've been using Callcentric for almost 5 years now and absolutely love it.
How we set-up Callcentric plus more information

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Topic: Comcast
3/5 (24)
Kameal Evangel Celestee (Mount Juliet) says...
I just wanned to mention that I bought an Arris / Motorola SB6190, it is similar to the SB6141 and the SB6183 except it supports 32 channel downstream. I bought mine from Best Buy (where I work) and Comcast were able to configure it withoit any issues. I pay Comcast for a 10mbps download speed but I am currently receiving 12mbps. I realise this modem is a bit more expensive, however it is well worth it for the extra speed.
Dan says...
Thanks for that. We're in the process of adding it to our site. In the meantime here's a link to it at Amazon: ARRIS SB6190 at Amazon
Dan says...
And here's the link to Best Buy: ARRIS SB6190 at Best Buy
Dan says...
We added the SB6190 to our site. Here it is: ARRIS/Motorola SB6190
Melinda (Lawrenceville) says...
So with that modem, you can't have voice service from comcast, but if I have voice service with another company, can I connect my box to the modem?
I wanted to know which would be the best modem to get. I would like to change from at&t to comcast but want to get my own modem and router but seperate. I need a good router because my son plays games online and we have many people streaming at the same time. So which do you think would be the best modem. I was thinking on changing to comcast voice, have to compare the prices.
Dan says...
You're correct, that modem won't work with Comcast voice, but you can connect a box to it for other VOIP phone services. If you do get Comcast voice, look here for modems that will work: Comcast Voice Modems . Which modem you decide to get depends on the speed of your internet service, but a good modem to buy that would cover you well into the future would be the ARRIS SB6183
jenja jose (St. Paul) says...
No EMTA on this model, so my understanding is it can't work with comcast bundled services, right? My question, can i use it anyway if I don't care about landline?
Rich (La Grange.) says...
Any recommendations on modem/router having very good range/ or which don't
Tim (Vail) says...
I have Xfinity triple play. Went to Amazon to buy and some of the comments say there is a newer version of the Arris TG862G. Do you know the model number and whether it is compatible with Comcast? The voice part really puts you in a limited selection for modems.
Paul Jones (New Castle) says...
Worst service I've every had. Plus you can't understand the people. Goin to Metronet
Shelly (Miami Gardens) says...
Hey I'm looking into comcast internet and don't want to lease what modem should I get? In the 33054 area
irive006 (Miami) says...
For Comcast, go with the Motorola SB6141. its going to cost you around $70. Easy to get up and running.
Jimmy says...
These are expensive.
James Browne (San Francisco) says...
Will Comcast allow you to use your own Arris TG 862G Docsis3.0 cable modem for Triple Play in the 94115 Zip Code area. I don't want to rent a modem at $10 per month.
Dennis (Fremont) says...
How about the Arris TM822G? Does it work ok with triple play xfinity X1?
Dan says...
Yes it does. So does the Arris TG862G. Both are linked above. The X1 service is the TV service, the internet service is the same for X1 and non-X1 subscribers.
Dennis (Fremont) says...
Thanks Dan. I've read that Comcast will not activate these modems since they are not on their 'retail' list?!!! I would like to purchase one and return the POS they lease me but if this is true, I'm guessing there's some screwing going on here by Comcast. You know anything about this?
Dan says...
I had heard about this but it seemed the vast majority of people buying the retail Arris TM822G could get them to work. After doing some more research due to your comments, we're taking it off the list. You know this, but for others, there's a chance that either Comcast won't be able to provision the modem or after they push out a firmware update, the phone part won't work anymore. So for now, the only approved retail eMTA (telephony) modem that Comcast officially allows is the ARRIS TG862G. Its $20-$30 more than the TM822G and has a built-in WIFI. If you don't want to use the WIFI, you can turn it off and put it in bridge mode and use a different WIFI router.

The TM822g that is leased from Comcast still works. If your local Comcast says that the retail version will work, here's a link to it on Amazon: ARRIS TM822G

Here's a link to more discussion about the retail version of the TM822G on the Comcast forum: TM822G Retail Discussion
Admin:


Louis Pisarro (Mount Laurel) says...
The TM722g is NOT compatible with Comcast, it is end of life.
Dan says...
Thanks for the heads up, we took it off the list. Looks like the retail version just went on the end of life list. Apparently Arris isn't supporting it anymore.
Dan says...
The retail version of the ARRIS TM722g is no longer on the end of life (EOL) list. So we're listing it again. Comcast might of mistakenly placed it on that list.
H M Motley (Richmond Va) says...
Interesting! I have triple play and am using an ARRIS 722G.

It's main problem is the very bad RF interference it puts out. I'm a ham radio operator and it puts out RF in the 160 meter band 1800-2000 kHZ. Are their newer models any cleaner?
Is there no other brand that will work?

Dan says...
If you already lease an ARRIS TM722G, it'll still work on Comcast. I think they're just recommending that customers not to buy one.

Sorry I don't know if any of the other models put out less RF interference. Anybody else have an idea?

agudeza says...
Not according to Comcast. Go to the device info page on the comcast website and it clearly shows the TM722G is NOT an end of life modem as of yet.
Dan says...
The retail version of the TM722G was on the EOL list all summer long and you're right, it is not now. Might of been a mistake by Comcast putting it on the list in the first place.
Steve (Delaware) says...
Can I add a modem/router to my existing Comcast system that already has one on it. I want the kids and their friends to have their own network so they don't have to use mind that has has a password I'd rather not give out.
Dan says...
All of the above cable modems with a built in wifi router have an option called a guest account. You can set up a separate network with its own password and don't have to give out your main network password. If you already have a modem, there's plenty of WiFi routers that have that option as well.
Bob (St Johns) says...
I have comcast/ Xfinity. Triple play which modem do you need for triple play?
Dan says...
Look right above this comment section for "Comcast Voice or Triple Play Customers" or click this: http://www.buyacablemodem.com/comcast.php#voice
Steven Solomon (East Brunswick) says...
The problem is that Comcast charges $10 a month more for just the TV & internet. If you have their triple play it's less money then if you have just the TV & internet
Scott (Bristol In) says...
Not true. I have triple play and my modem is $10/mo
Dean (Seattle) says...
I think Steven means that if you have TV/Internet/Phone with comcast, you pay less than if you just have Tv/Internet. The "rent" on the modem is the same either way.
That said, I just canceled TV/Phone w/ Comcast for a $35/mo savings. Will buy my own modem for an extra $10 savings and I get Free TV with an Antenna now. Anything else I can pull in on the internet and watch on my computer ... that I can hook up to the TV. That's over $600 per year savings!
Ana (Taylor) says...
If you brought a Wi-Fi modem which one did you get? I have basically the same set up you have. I am lucky to have my daughter next door with Direct TV which I can at least go online and log on and watch my AMC favorites, lol.. But I needed faster speed to play my online games so I dropped Verizon and got Xfinity. Now I want a wireless modem and need to find a good one so I am browsing for one.
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Price / Features Comparison

See every approved retail modem's price and features in an easily sorted and searchable table:

Comcast

Comcast Business

Cox

Spectrum

Cable ONE

Suddenlink

Time Warner/Road Runner/Bright House


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