NETGEAR CM500 Modem Product Details & Review



The NETGEAR CM500 cable modem is ideal for XFINITY Blast and Extreme customers. However, it is compatible with almost every cable provider. The CM500 is for speed tiers mostly up to 300 Mbps. ​It is Cable Labs and DOCSIS 3.0 certified and is 16X faster than 2.0 devices.

Top Compatible Speed Tier300 Mbps
WiFi (Modem Router Combo)NO
Channel Bonding16×4
Voice eMTANO
Year Released2015
CM500 Quick Specs View
XFINITY Cable Modem
NETGEAR CM500 Web Ratings

Next to the ARRIS SB6141, this cable modem is one of the best-selling modems of all time. I own one and have been using it with Comcast for over two years now. Not once have I had a problem with it. My subscribed speed is 100 Mbps and it keeps up with it continuously. This modem has been a perfect fit for my XFINITY service. I highly recommend this top modem to anyone looking for one for speeds up to 300 Mbps.

Approved Modems CM500 Review

This is a good modem for Comcast if you subscribe to speeds up to 300 Mbps. If you intend on boosting your speed with XFINITY in the near future, consider a DOCSIS 3.1 modem. Although more expensive, a 3.1 modem is backward compatible with 3.0. A 3.1 modem would be the last you would need for at least 10 years, provided it lasts that long.

Internet Service Provider Compatibility List

You will find the NETGEAR CM500 compatible with the following Internet Providers.

  • Altice – Suddenlink / Optimum
  • Atlantic Broadband – ABB Modems
  • Comcast Business
  • Comcast XFINITY – XFINITY Modems
  • COX – Cox Modems
  • Grande Communications
  • Mediacom
  • Midcontinent Communications
  • Service Electric
  • Sparklight / Cable One
  • Spectrum (BHN, Charter, TWC)
  • Wave Broadband
  • WoW! – WideOpenWest
  • Zito Media

NETGEAR CM500 Manuals and Support

View manuals and guides for the CM500 below. Documents include Quick Start Guide, Full Manual, and Specs sheet. Topics include

Use LEDs to Troubleshoot
• Cannot Log In to the Cable Modem
• Troubleshoot the Cable Internet Connection

Product Specs & Details

  • Known Part Numbers
    • CM500-100NAS
    • CM500-1AZNAS (Amazon Part #)
  • Released: 03/18/2017
  • Country Of Origin: China
  • Height: 7.28 Inches
  • Width: 2.36 Inches
  • Depth: 4.88 Inches
  • Price On Amazon (09/03/2021) : $44.83
  • 4.7 / 5: 24 Ratings
  • UPC: 0606449107166

• Gigabit Ethernet port
• DOCSIS® 3.0 CableLabs® certified
• Supports IPv6
• Secure connection
• Easy installation

Dimensions: 2.36 x 4.88 x 7.28 in
(60 x 124 x 185 mm)
• Weight: 0.62 lb (0.28 kg)

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NETGEAR CM500 Resources, References, and Tools
Cox Setup & Activation
Sparklight Setup & Activation