(WCYB) — All local calls made in the 423 area code of Tennessee must be dialed using 10 digits beginning Tuesday. Calls using just 7 digits will not be completed, and will be routed to an announcement ...

Metro Detroit residents and businesses will soon need to adjust how they make local phone calls. Starting Oct. 7, all calls within the 313 area code must include the area code, ending traditional ...

East Tennessee has another new area code, and it's going to add three more digits to many people's local calls. Starting Aug. 5, people in upper and lower East Tennessee in the 423 area code region ...

Detroit's iconic 313 area code will soon share the spotlight with a new three-digit identifier as available phone numbers ...