For those of you looking for cable modem cm400, we have created a list that will simplify the decision-making process. In this list, you’ll discover details and an overview of the top 10 cable modem cm400. You will also find the buying guide on things to consider while shopping for the best cable modem cm400.

Those of you who are short on time can find a quick comparison table of the best cable modem cm400 below. Take a look at our top picks! Check out our helpful reviews and find out which products are worth the money. Keep reading to learn more.

Best cable modem cm400

IMAGE PRODUCT RATING
EDITOR’S CHOICE

NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)

NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)
9.8
Check Price Buy Now
PREMIUM PICK

NETGEAR Cable Modem CM500 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 400Mbps | DOCSIS 3.0

NETGEAR Cable Modem CM500 – Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 400Mbps | DOCSIS 3.0
9.5
Check Price Buy Now
PREMIUM CHOICE

NETGEAR Cable Modem CM400 - Compatible with all Cable Providers including Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS 3.0, Black, 8x4 Cable Modem (CM400)

NETGEAR Cable Modem CM400 – Compatible with all Cable Providers including Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS 3.0, Black, 8×4 Cable Modem (CM400)
9.2
Check Price Buy Now
NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS) (Renewed) NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS) (Renewed)
8.8
Check Price Buy Now
Accessory USA AC DC Adapter for Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 High Speed Cable Modem Power Supply Cord Accessory USA AC DC Adapter for Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 High Speed Cable Modem Power Supply Cord
8.5
Check Price Buy Now
UpBright 12V AC/DC Adapter Compatible with Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 Cable Modem Net Gear Push2TV PTV1000 PTV1000-100NAS PTV-1000 TV Receiver 12VDC 1A Power Supply Charger Accessory USA AC DC Adapter for Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 High Speed Cable Modem Power Supply Cord
8.1
Check Price Buy Now
ARRIS SURFboard SB6121 4x4 DOCSIS 3.0 Cable Modem (Renewed)-Black ARRIS SURFboard SB6121 4×4 DOCSIS 3.0 Cable Modem (Renewed)-Black
7.6
Check Price Buy Now
NETGEAR Cable Modem CM700 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 500 Mbps | DOCSIS 3.0 (Renewed) NETGEAR Cable Modem CM700 – Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 500 Mbps | DOCSIS 3.0 (Renewed)
7.5
Check Price Buy Now
NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16x4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More (Renewed) NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16×4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More (Renewed)
7.0
Check Price Buy Now
NETGEAR Cable Modem CM1000 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 1 Gigabit | DOCSIS 3.1, Black (CM1000-1AZNAS) NETGEAR Cable Modem CM1000 – Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 1 Gigabit | DOCSIS 3.1, Black (CM1000-1AZNAS)
6.6
Check Price Buy Now

NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)

EDITOR’S CHOICE

Specifications:

NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)

$79.97
$49.99
 in stock
8 new from $49.99
21 used from $17.96
Amazon.com
as of August 17, 2022 3:04 am

Features

  • ELIMINATE MONTHLY CABLE MODEM RENTAL FEES - Up to $156 per year
  • DOCSIS 3. 0 Cable Modem with 1 Gigabit Ethernet port. One (1) Gigabit Ethernet port with auto-sensing technology
  • Up to 340Mbps download and upload speed. Separate router required for WiFi. 8x4 channel bonding.
  • DOCSIS 3. 0 unleashes 8x faster download speeds than DOCSIS 2. 0
  • Ideal for streaming HD videos, faster downloads, and high-speed online gaming

NETGEAR Cable Modem CM500 – Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 400Mbps | DOCSIS 3.0

PREMIUM PICK

Specifications:

NETGEAR Cable Modem CM500 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 400Mbps | DOCSIS 3.0

$71.90  in stock
4 new from $70.80
8 used from $41.86
Free shipping
Amazon.com
as of August 17, 2022 3:04 am

Features

  • Save monthly rental fees: Model CM500 replaces your cable modem, saving you up to $168/yr in equipment rental fees.
  • Speeds by carrier: Spectrum (up to 400Mbps), Xfinity (up to 200Mbps), Cox (up to 150Mbps).
  • Works with any wifi router: Connect any WiFi router to this modem's Ethernet port to support all your wireless devices.
  • Ethernet connections: 1 Gigabit Ethernet port connects to your computer or separate WiFi router.
  • Modem technology: Engineered with 16x4 channel bonding and DOCSIS 3.0.

NETGEAR Cable Modem CM400 – Compatible with all Cable Providers including Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS 3.0, Black, 8×4 Cable Modem (CM400)

PREMIUM CHOICE

Specifications:

NETGEAR Cable Modem CM400 - Compatible with all Cable Providers including Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS 3.0, Black, 8x4 Cable Modem (CM400)

$83.49  in stock
3 new from $83.49
9 used from $7.99
Amazon.com
as of August 17, 2022 3:04 am

Features

  • COMPATIBLE WITH ALL MAJOR CABLE INTERNET PROVIDERS: Including certification by Xfinity by Comcast, COX, and Spectrum. NOT compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and any bundled voice service.
  • SAVE MONTHLY RENTAL FEES: Model CM400 replaces your cable modem saving you up to $168/yr in equipment rental fees.
  • BUILT FOR SPEED: Best for cable provider plans up to 100 Mbps speed.
  • WORKS WITH ANY WiFi ROUTER: Connect any WiFi router to this modem's ethernet port to support all your wireless devices.
  • ETHERNET CONNECTIONS: 1 Gigabit Ethernet port connects to your computer or separate WiFi router.

NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS) (Renewed)

Specifications:

NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS) (Renewed)

$90.00  in stock
Amazon.com
as of August 17, 2022 3:04 am

Features

  • ELIMINATE MONTHLY CABLE MODEM RENTAL FEES - Up to $156 per year
  • DOCSIS 3. 0 Cable Modem with 1 Gigabit Ethernet port. One (1) Gigabit Ethernet port with auto-sensing technology
  • Up to 340Mbps download and upload speed. Separate router required for WiFi. 8x4 channel bonding.
  • DOCSIS 3. 0 unleashes 8x faster download speeds than DOCSIS 2. 0
  • Ideal for streaming HD videos, faster downloads, and high-speed online gaming

Accessory USA AC DC Adapter for Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 High Speed Cable Modem Power Supply Cord

Specifications:

Accessory USA AC DC Adapter for Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 High Speed Cable Modem Power Supply Cord

$18.89  in stock
Amazon.com
as of August 17, 2022 3:04 am

Features

  • Safety: Our Products are CE / FCC / RoHS certified, tested by the manufacturer to match and / or exceed the OEM specifications. OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection)
  • This Adapter is a Brand New, High Quality Never USED (non-OEM)
  • Compatiblity: AC DC Adapter For Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 High Speed Cable Modem Power Supply Cord
  • Note:please make sure the model of your device before buying

UpBright 12V AC/DC Adapter Compatible with Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 Cable Modem Net Gear Push2TV PTV1000 PTV1000-100NAS PTV-1000 TV Receiver 12VDC 1A Power Supply Charger

Specifications:

UpBright 12V AC/DC Adapter Compatible with Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 Cable Modem Net Gear Push2TV PTV1000 PTV1000-100NAS PTV-1000 TV Receiver 12VDC 1A Power Supply Charger

$9.99  in stock
1 used from $9.97
Amazon.com
as of August 17, 2022 3:04 am

Features

  • World Wide Input Voltage 100-240VAC 50/60Hz. OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection). Tested Units. In Great Working Condition. UpBright 30 days money back guarantee. 1 full year service warranty.
  • UpBright New Global 12V AC / DC Adapter Compatible with Netgear CM400 CM400-100NAS CM400-1AZNAS DOCSIS 3.0 High Speed Cable Modem 12VDC 1A DC12V 1000mA 12.0V 1.0A Switching Power Supply Cord Cable PS Wall Home Charger Mains PSU
  • Compatible with: NetGear Push2TV PTV1000 PTV1000-100NAS PTV-1000 PTV1000100NAS TV Receiver

ARRIS SURFboard SB6121 4×4 DOCSIS 3.0 Cable Modem (Renewed)-Black

Specifications:

ARRIS SURFboard SB6121 4x4 DOCSIS 3.0 Cable Modem (Renewed)-Black

$38.77  in stock
Amazon.com
as of August 17, 2022 3:04 am

Features

  • This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty. IMPORTANT NOTEL: A few units might show the brand as Motorola (and not Arris) as Arris had acquired Motorola for 2 years; hence it will be the same product and the same model
  • Requires CABLE Internet Service, if not sure your provider is CABLE call them to confirm. Does NOT work with Charter cable provider.
  • Compatible with MOST Major CABLE providers like Comcast/Xfinity, Cox, Time Warner, Mediacom, Bright House.
  • Wired modem only, does NOT include WIFI Router or VOIP Telephone adapter. Gigabit Ethernet port to connect to computer or Router for fast downloads.
  • Internet download speeds up to 172 Mbps and upload speeds up to 131 Mbps based on your Cable provider service. Good for streaming Video and gaming on multiple devices at a time.

NETGEAR Cable Modem CM700 – Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 500 Mbps | DOCSIS 3.0 (Renewed)

Specifications:

NETGEAR Cable Modem CM700 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 500 Mbps | DOCSIS 3.0 (Renewed)

$68.00
$64.00
 in stock
7 new from $64.00
Free shipping
Amazon.com
as of August 17, 2022 3:04 am

Features

  • COMPATIBLE WITH ALL MAJOR CABLE INTERNET PROVIDERS: Including certification by Xfinity by Comcast, COX, and Spectrum. NOT compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and any bundled voice service.
  • SAVE MONTHLY RENTAL FEES: Model CM700 replaces your cable modem saving you up to $150/yr in equipment rental fees.
  • BUILT FOR SUPER-FAST SPEED: Best for cable provider plans up to 500 Mbps speed.
  • WORKS WITH ANY WiFi ROUTER: Connect any WiFi router to this modem's ethernet port to support all your wireless devices.
  • ETHERNET CONNECTIONS: 1 Gigabit Ethernet port connects to your computer or separate Wi-Fi router.

NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16×4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More (Renewed)

Specifications:

NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16x4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More (Renewed)

$44.99  in stock
2 new from $44.99
Amazon.com
as of August 17, 2022 3:04 am

Features

  • Netgear Certified Refurbished product is manufacturer refurbished to work and look as new with 90 Day Warranty and email support. All accessories are included with limited documentation and additional information online.
  • Eliminate monthly cable modem rental fee's ($120 or more a year).
  • DOCSIS 3.0 Cable Modem with 1 Gigabit Ethernet port.
  • Up to 680Mbps download and upload speed. Separate router required for WiFi. 16x4 channel bonding
  • Netgear Refurbished product may have a removed serial number. You will need to state the product is refurbished (state the full part number) if emailing customer support. See the attached (image) flyer to obtain the Serial Number and MAC Address information that maybe needed by your Cable provider before contacting them.

NETGEAR Cable Modem CM1000 – Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 1 Gigabit | DOCSIS 3.1, Black (CM1000-1AZNAS)

Specifications:

NETGEAR Cable Modem CM1000 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 1 Gigabit | DOCSIS 3.1, Black (CM1000-1AZNAS)

$199.99  in stock
9 new from $167.88
28 used from $89.00
Amazon.com
as of August 17, 2022 3:04 am

Features

  • Compatible with all major cable internet providers with internet speed up to 1Gbps. Currently certified with Spectrum and Cox (up to 1Gbps), Xfinity (up to 800Mbps). Not compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and any bundled voice service.
  • Save monthly rental fees: Model CM1000 replaces your cable modem saving you up to dollar 168/year in equipment rental fees.
  • Works with any Wi-Fi router: Connect any Wi-Fi router to this modem's Ethernet port to support all your wireless devices.
  • Ethernet connections: 1 Gigabit Ethernet port connects to your computer or separate Wi-Fi router.