SPOKANE, Wash. — The only area code in Washington that allows seven-digit dialing for phone calls is 509. Beginning April 24, callers will all dial the same way in the state, by using 10-digit ...

Starting in early August, people in the 423 area code region will need to dial the full 10 digits for local calls.

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