Motorola MT7711 24x8 DOCSIS 3.0 Modem + AC1900 Router for Xfinity Internet & Voice Black MT7711 - Best Buy
Amazon.com: NETGEAR C3000-100NAS N300 (8x4) WiFi DOCSIS 3.0 Cable Modem Router (C3000) Certified for Xfinity from Comcast, Spectrum, Cox, Cablevision & More : Electronics
I like this from Best Buy | Cable modem, Wireless router, Xfinity
Refurbished: Motorola MG7550 DOCSIS 3.0 Cable Modem plus AC1900 Wi-Fi Router 686 Mbps Comcast Xfinity Time Warner Cable | Fast Server Corp. www.srvfast.com
How to Set Up your Xfinity xFi Gateway Modem - YouTube
MOTOROLA MB7621 Cable Modem, DOCSIS 3.0 - Pairs with Any Wi-Fi Router | Approved by Comcast Xfinity, Cox, and Spectrum | 1000 Mbps Max Speed - Walmart.com