Area code 408

About area code 408

Area code 408 is a geographic area code in California, in service since January 1, 1959, according to the North American Numbering Plan Administrator (NANPA). It is an overlay: 408 and 669 cover the same territory, so neighbors on the same street can have different area codes. It is in the Pacific time zone. The places with the most assigned exchanges include San Jose, San Jose, Sunnyvale, San Jose, and Campbell. By population, its largest named places are San Jose, Salinas, Sunnyvale, Gilroy, and Morgan Hill.

Cities and towns in area code 408

408 holds 3.6% of the 22,087 central office codes assigned in California, the most of any code in the state. 9 Census places could be matched to rate centers with 408 exchanges; the most populous are San Jose (997,000), Salinas (161,000), Sunnyvale (157,000), and Gilroy (60,390). For a storefront or service area inside 408, the place pages show which prefixes are rated local there.

Ten-digit and seven-digit dialing in 408

According to NANPA's dialing-plan data, local calls within 408 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere.

Carriers with 408 numbers

28 carriers hold the 787 central office codes assigned in 408. Pacific Bell has the most, with 328 (42%). 442 of the codes (56%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Local calling areas in 408

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 408 has codes in 14 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

How full is area code 408?

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 787 are assigned in 408, 98% of 800. 13 were assigned in 2020 or later.

Getting a 408 number for your business

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

If you already have a number in area code 408, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.