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Cox Certified Cable Modems

Last Updated: Fri, 09 Jun 2017 > Related Articles

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View information on approved modems for use on all Cox High Speed Internet packages, excluding Gigablast.


Before You Begin 

The table below provides an overview of upcoming changes to equipment requirements for Cox High Speed Internet based on your current device or status.

If you are a...Then...
Customer who has a DOCSIS 1.1 Device

Effective August 7, 2017, DOCSIS 1.1 modems will no longer function on the Cox network. Visit www.cox.com/modemupdate for more information. 

Customer who has a DOCSIS 2.0 Device
  • If you subscribe to Preferred 100 or Ultimate and have a DOCSIS 2.0 device, your Internet service will continue to work uninterrupted provided you do not make changes to any of your Cox services, including TV and Phone. 
  • We strongly recommend that you upgrade to a DOCSIS 3.0 (or higher) device promptly for optimal Internet performance and to be able to make changes to your account. 
  • To upgrade your device, visit www.cox.com/upgrademymodem.
New Customer
  • If you subscribe to Cox Preferred or higher Internet service after June 1, 2017, and you choose to purchase your own retail modem for use with your Cox Internet service, a DOCSIS 3.0 or higher modem is required. 
  • You will not be able to access your Cox Internet service with a DOCSIS 2.0 or lower modem. 
  • A DOCSIS 3.0 or higher modem is highly recommended for Starter and Essential Internet customers. 
  • Refer to the Certified Cable Modem list below to determine whether your modem is compatible with your Cox Internet service package.

The DOCSIS 3.0 and 3.1 devices listed below meet our service and performance requirements and are certified for use with all Cox High Speed Internet packages, excluding Gigablast.

  • Speeds are not guaranteed and may vary based on individual circumstances.
  • Cox does not promote or endorse any particular device or manufacturer for your use.
  • Review the modem manufacturer’s specifications to choose a device based on your individual needs.

If you have a DOCSIS 2.0 device, Cox strongly recommends that you upgrade to a DOCSIS 3.0 device in order to receive optimal speeds. Future speed increases may not be achievable with these devices. To upgrade your device, visit www.cox.com/upgrademymodem.


DOCSIS 3.0 devices are required for all new Cox High Speed Internet customers. Current Cox customers should ensure they have a DOCSIS 3.0 device in order to consistently receive optimal speeds. Additionally, Ultimate customers are required to have a DOCSIS 3.0 device with a minimum of 16 x 4 or higher channel bonding to achieve package speeds.


DOCSIS 3.1 devices listed below are certified for use with all Cox High Speed Internet package speeds, excluding Gigablast.

  • Cox-certified DOCSIS 3.1 devices are backward-compatible with DOCSIS 3.0 technology.
  • DOCSIS 3.1 service may not be available in all areas.

Special Recommendations for WiFi

  • If your primary Internet usage will be via wireless devices such as laptops, tablets, and mobile devices, Cox recommends a dual band 802.11-AC WiFi modem. Dual band 802.11-AC WiFi modems provides the best in-home WiFi experience.
  • To learn more about WiFi, visit www.cox.com/wifisupport.

Note: The Highest Compatible Package outlined in the table below is based on a wired connection.

BrandModelChannelsHighest Compatible PackageDual Band 802.11AC WiFi Modem
ARRIS / SurfboardCM8200DOCSIS 3.1
32 x 8
ARRIS / SurfboardDG246024 x 8UltimateYes
ARRIS / SurfboardTG168224 x 8UltimateYes
ARRIS / SurfboardTG247224 x 8UltimateYes
ARRIS / SurfboardSB61204 x 4PreferredNo
ARRIS / SurfboardSB61214 x 4PreferredNo
ARRIS / SurfboardSB61418 x 4PremierNo
ARRIS / SurfboardSB61808 x 4PremierNo
ARRIS / SurfboardSB61828 x 4PremierNo
ARRIS / SurfboardSB618316 x 4UltimateNo
ARRIS / SurfboardSB619032 x 8UltimateNo
ARRIS / SurfboardSBG64008 x 4PremierNo
ARRIS / SurfboardSBG65808 x 4PremierNo
ARRIS / SurfboardSBG67008 x 4PremierYes
ARRIS / SurfboardSBG67828 x 4PremierYes
ARRIS / SurfboardSBG758032 x 8UltimateYes
ARRIS / SurfboardSBG6900-AC16 x 4UltimateYes
ARRIS / SurfboardSB8200DOCSIS 3.1
32 x 8
AsusCM1616 x 4UltimateNo
CiscoDPC30004 x 4PreferredNo
CiscoDPC30088 x 4PremierNo
CiscoDPC30108 x 4PremierNo
CiscoDPC38258 x 4PremierNo
CiscoDPQ39258 x 4PremierNo
DLinkDCM3018 x 4PremierNo
Hitron-ZyxelCDA303608 x 4PremierNo
LinksysCM30088 x 4PremierNo
LinksysCM301616 x 4UltimateNo
LinksysCM302424 x 8UltimateNo
MotorolaMB72208 x 4PremierNo
MotorolaMB742016 x 4UltimateNo
MotorolaMG73108 x 4PremierNo
MotorolaMG73158 x 4PremierNo
MotorolaMG755016 x 4UltimateYes
NetgearC30008 x 4PremierNo
NetgearC3000v28 x 4PremierNo
NetgearC37008 x 4PremierNo
NetgearC3700v28 x 4PremierNo
NetgearC62208 x4PremierNo
NetgearC625016 x 4UltimateNo
NetgearC630016 x 4UltimateYes
NetgearC6300BD8 x 4PremierYes
NetgearC690024 x 8UltimateYes
NetgearC700024 x 8UltimateYes
NetgearC7000v224 x 8UltimateYes
NetgearCG3000D8 x 4PremierNo
NetgearCG3000Dv28 x 4PremierNo
NetgearCG4500BD8 x 4PremierNo
NetgearCMD31T4 x 4PreferredNo
NetgearCM4008 x 4PremierNo
NetgearCM50016 x 4UltimateNo
NetgearCM60024 x 8UltimateNo
NetgearCM70032 x 8UltimateNo
NetgearCM1000DOCSIS 3.1
32 x 8
SMCD3CM160416 x 4UltimateNo
TP-LINKTC-76108 x 4PremierNo
TP-LINKTC-762016 x 4UltimateNo
TP-LINKTC-W79608 x 4PremierNo
TP-LINKCR70016 x 4UltimateYes
UbeeDDW3658 x 4PremierNo
UbeeDDW3668 x 4PremierNo
UbeeDVW3268 x 4PremierNo
Zoom53414 x 4PreferredNo
Zoom5341J8 x 4PremierNo
Zoom53458 x 4PremierNo
Zoom53508 x 4PremierNo
Zoom53528 x 4PremierNo
Zoom53548 x 4PremierNo
Zoom53608 x 4PremierNo
Zoom53638 x 4PremierNo
Zoom537016 x 4UltimateNo

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