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 ...

Time is running out on the 415 area code and so are available 415 numbers, especially if you live in Marin County.

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.

Anyone attempting to land a place to reside in this city of ours knows all too well: The 415 is full. No, really. The 415 is full. In a long-coming sea change, the tapped 415 area code will soon give ...