Next month, people with 602 and 623 area codes must start dialing 10 digits (their area code +their phone number) for all local calls.

Next month, people with 602 and 623 area codes must start dialing 10 digits (their area code +their phone number) for all local calls.

The holiday takes its name from Phoenix's 602 area code, which dates back to 1947, when AT&T assigned the prefix to the entire state of Arizona.

Across Phoenix, businesses are celebrating 602 Day. The annual celebration honor's the city's 602 area code, highlighting the cultures, community and businesses that make Phoenix unique.

The 602 area code was running out of phone numbers, so a split had to be made.

PHOENIX (3TV/CBS 5) — This year, the Phoenix area changed how it dials telephone numbers. Specifically, if you have a 602 or 623 number, as of Aug. 12, you must include the area code when ...

Arizona was assigned the 602 area code in 1947 when AT&T created the nationwide telephone plan, according to the 602 Day website. Today, the state has five area codes: 602, 520, 480, 623 and 928 ...

Beginning Aug. 12, 602 or 623 phone numbers must dial the area code and phone number on all calls, including ones within the same area code.

Monday, June 2 marks “602 Day,” where the city of Phoenix partners with local businesses to offer special discounts and deals to honor the city’s most historically significant area code.