Geolocation for Comcast is accurate to the metro area, sometimes to the city, because Comcast's network is regionally structured. Xfinity gateways default to 10.0.0.1 as the router address. Dynamic IPs change infrequently — often months.
Networks (ASN) / AS7922
AS7922 Comcast Cable (Xfinity)
Residential ISPUS
The largest residential broadband provider in the United States. AS7922 addresses are overwhelmingly real households and small businesses.
Frequently asked questions
How accurate is location for a Comcast IP?
Typically within the correct metropolitan area. Street-level location is never available from an IP address.