Astound Broadband Powered by RCN Approved Modems –
Amazon.com: TP-Link TC-7610 DOCSIS 3.0 (8x4) Cable Modem. Max Download Speeds Up to 343Mbps. Certified for Comcast XFINITY, Spectrum, Cox, and more. Separate Router is Needed for Wi-Fi : Electronics
Amazon.com: Motorola MB7621 Cable Modem | Pairs with Any WiFi Router | Approved by Comcast Xfinity, Cox, and Spectrum | for Cable Plans Up to 900 Mbps | DOCSIS 3.0 : Electronics
NeweggBusiness - NETGEAR AC1750 (16x4) DOCSIS 3.0 WiFi Cable Modem Router Combo Certified for Xfinity from Comcast, Spectrum, Cox, Cablevision & more (C6300)