Visitor

 • 

1 Message

Tuesday, June 30th, 2026 11:32 PM

MAC address checking

I got a used cable Modem. How Can I check if Xfinity accepts Modem's MAC address?

Oldest First
Selected Oldest First

Expert

 • 

118.8K Messages

1 hour ago

Try getting it activated and see if the system accepts it;

https://www.xfinity.com/support/articles/activate-xfi-gateway-app 

One should be careful if buying used modems from someone, charity outlets, or from sites like eBay. Many times, they wind up being listed in Comcast's database as having been stolen / unreturned, and they won't provision them for service. To be safe, buy only brand new modems in their original packaging from reputable retailers. Good luck !

forum icon

New to the Community?

Start Here