Comcast Xfinity IP Ranges & Speed Test

Major US Residential Broadband Provider

Cable BroadbandDual-Stack IPv6Dynamic IPsHigh Bandwidth

Access Status

ℹ️ You are viewing Comcast Xfinity details, but you appear to be using Anthropic, PBC.

Your IP: 216.73.216.41

Network Insights

Comcast Xfinity is one of the largest cable internet providers in the USA. They assign dynamic IPs to residential customers, which usually change only when the modem is rebooted for an extended period or MAC address changes.

IPv6 Adoption

Comcast was an early adopter of IPv6, and most Xfinity connections are fully dual-stack (IPv4 + IPv6).

External Resources

Useful links for Comcast Xfinity users:

Run a Speed Test for Comcast Xfinity
Whois Lookup for Comcast Xfinity
BGP Toolkit Data

Standard Tools

Port Checker Subnet Calc WebRTC Leak