ARRIS SURFboard 16x4 Cable Modem / AC1600 Dual-Band WiFi Router. Approved for XFINITY Comcast, Cox, Charter and most other Cable Internet providers for plans up to 300 Mbps. - Walmart.com
Best Cable Modem and WiFi Router Combo: How It Works, Top-Rated Picks – Rolling Stone
Get xFi - Personalize, Manage, and Protect Your Xfinity Internet
How to know if I have a router and modem in one - Quora
How to Get the Best Cable Modem: Buy or Rent From Your ISP? | PCMag