All customers with the 423 area code should prepare for mandatory 10-digit dialing and the introduction of the new 729 area code. Starting Aug. 5, all local calls made within the 423 area code ...

The Florida Public Service Commission says for people who have 904 as their area code, they'll have to start 10-digit dialing beginning on Jan. 29.

KNOXVILLE, Tenn. (WVLT) - With a new area code coming to East Tennessee in September, 10-digit dialing will be required beginning next week.

Soon, several East Tennessee counties will have a new area code, and it's going to add three more digits to many people's local calls.

Identify your telephone number as a 10-digit number and include the area code when giving the number to friends, family, business associates and customers, etc.

Mid-Missouri callers are advised to prepare for 10-digit local dialing as a new area code is established to cover the area.