My IP address is not local ??????

You likely recently received a new / different WAN (public) IP address assignment to your connection from their DHCP server / IP address pool, and the rDNS / geolocation data that is associated with it is now incorrect for you as it previously belonged to someone else that lived in that other area. 

Comcast shuffles blocks of IP addresses around the country all the time. And after doing local plant maintenance / upgrades. ISP's don't correct this. A third-party service does. Unfortunately, this is typically a back-burner thing to get corrected. The only thing that you can do is to report it. You can try this;

https://www.maxmind.com/en/geoip-location-correction 

https://support.google.com/websearch/contact/ip/ 

https://ipinfo.io/corrections 

https://www.whatismyip.com/ip-address-geolocation-incorrect/ 

https://ipregistry.co/data-corrections 

Wait for the geolocation provider to approve your request. If your request is approved, the amount of time it takes to see the correction varies by provider. The average is two weeks to a month or more.

You can also try this;

If you are using a router that has a MAC address cloning feature, you can clone a different MAC address into it. This will force a change of your Comcast assigned WAN / public IP address. No guarantees that the new address won't also have incorrect geo-data as it may be from the same block of IP's. YMMV.

And you could also try using a VPN service but it's a crapshoot on what IP / endpoint geolocation will be presented to their servers.

Official article: https://www.xfinity.com/support/articles/correct-geolocation-data 

Hi there, and welcome to the Xfinity Forums Community, user_licfmd! We’re really glad you’ve joined us, and we’re here to help you get the most out of your sports viewing experience.

At Xfinity, we know how important it is to catch every play, goal, and buzzer-beater. That’s why we offer more live sports than anyone else; so you can enjoy the games you love, your way, whether it's live in HD on your TV, streaming online, or On demand with Xfinity On Demand. As a sports fan myself I understand how frustrating it can be when a game isn’t available to watch. Sometimes, this is due to blackout restrictions—rules set by sports teams, leagues, schools, or conferences. These restrictions usually happen when a game is being shown on a different channel or leagues (or schools and conferences) prohibit certain games from being seen on certain channels due to ticket sales or games being carried on other channels. You can learn more about this here. 

I also wanted to share a quick breakdown of how every device connected to the internet gets a unique IP address. This IP is assigned by a DHCP server (Dynamic Host Configuration Protocol). The server “leases” this IP to your device for a set period of time. Most of the time, your device will automatically renew this lease, so you won’t even notice it happening. But occasionally—especially during system maintenance—you might get a short-term lease that expires. If the lease doesn’t renew automatically, you may need to manually release and renew your IP address to restore your connection. This helpful article has step-by-step directions to do so. I hope this information helps!