Cities in area code 415

14 localities · NANPA data, current as of July 28, 2026.

Area code 415 serves 14 localities in California, led by San Francisco:central Da, San Rafael, San Francisco:montrose-evergreen Da. The table lists every rate center — the billing locality each prefix is anchored to — with its share of the code's 784 active prefixes.

By numbering footprint the leading localities are San Francisco:central Da, San Rafael, San Francisco:montrose-evergreen Da, San Francisco:juniper Da, Novato, Sausalito, Mill Valley and Belvedere, and 5 smaller communities down to single-prefix localities. Prefix counts track lines in service, so the ranking is a reasonable proxy for where the code's subscribers actually are.

Metropolitan coverage: 14 rate centers belong to FCC top-100 metro areas.

Overlap note: 14 localities are shared with other area codes, so a neighbor's number may differ in its first three digits.

Clock-wise the coverage is Pacific.

A caller's real location can differ: numbers port between carriers and follow their owners when they move. Use the prefix tables to see where a specific number block was issued.

FAQ

What is the biggest city in area code 415?

San Francisco:central Da holds the most active prefixes (483), making it the code's largest numbering locality.

How many places does 415 cover?

14 rate centers in California hold active 415 prefixes, from San Francisco:central Da down to communities with a single prefix.

Does a 415 number guarantee the caller lives in one of these places?

No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.