Most people know you’re a San Franciscan or a Marin County dweller if you give them your telephone prefix of 415. Well, not for everyone, not anymore. Beginning on Saturday, the 415 area code ...

The 415 area code, which was established in 1947, includes San Francisco, most of Marin County and a small portion of San Mateo County, according to a Marin County news release.

San Rafael-ites won't be assigned a 628 number. Instead they'll get a classic 415 area code, but the prefix will come from some another town. "Belvedere and Larkspur still have some," she added.

The San Francisco region's 415 telephone area code is nearly full because of the cellphone surge and a 628 area code overlay is coming in 2015.

SAN FRANCISCO (KRON) — Major changes to phone service in San Francisco, Marin and parts of San Mateo are only a few weeks away. It’s all part of the rollout of the new 628 area code which wil… ...

In 1959, the state carved two new area codes - 707 and 408 - from 415's territory. The 510 code followed in 1991, 650 in 1997. The numbers came to mean different places, with different identities.

Sharon Smith-Mauney talks on her cell phone at Yerba Buena Gardens in S.F. All eleven digits for 415 area codes must be dialed after the 628 area code is activated Saturday.