I received two calls recently where the caller ID screen shows "area 317" above the actual number, then below this it shows the actual 10 digit number with a different area code.. The "area 317" I have found out is an Indiana area code, my area code is Massachsuetts 978, which is shown with the number.
Any ideas as to what this could be?
I can definitely understand how that would be confusing. Have you already attempted any troubleshooting steps by logging into the Xfinity My Account app, select your telephone service and then troubleshooting to see if that resolves the issue of seeing two area codes?