ARRIS Surfboard Gigabit DOCSIS 3.1 Cable Modem, 10 Gbps Max Speed, Approved for Comcast Xfinity and Cox. (SB8200) Price: $169.00 (as of 02/06/2019 07:52 PST- Details) & FREE Shipping.

Comcast Xfinity and Cox Cable APPROVED! Spectrum (Charter, Time Warner and Brighthouse) and others pending approval.
Not compatible with: Verizon, AT&T, or CenturyLink. Not compatible with bundled voice services.
Cable Modem only (no WiFi router)

Usually ships in 24 hours