Area code 628

Where area code 628 is

NANPA lists 628 as an in-service geographic area code for California, first put into service on March 21, 2015. It is an overlay: 628 and 415 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 Francisco, San Rafael, Belvedere, Novato, and Corte Madera. By population, its largest named places are San Francisco, San Rafael, Novato, Mill Valley, and Corte Madera.

Where 628 numbers are local

628 holds 0.87% of the 22,087 central office codes assigned in California, the 32nd most of the state's 41 codes. 7 Census places could be matched to rate centers with 628 exchanges; the most populous are San Francisco (828,000), San Rafael (59,961), Novato (52,311), and Mill Valley (13,904). For a storefront or service area inside 628, the place pages show which prefixes are rated local there.

Dialing 628 numbers

According to NANPA's dialing-plan data, local calls within 628 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.

Who holds 628 exchanges

33 carriers hold the 193 central office codes assigned in 628. Fractel, LLC has the most, with 33 (17%). 192 of the codes (99%) 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.

Rate centers and towns in 628

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 628 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.

Number supply in 628

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). 193 are assigned in 628, 24% of 800. 84 were assigned in 2020 or later.

A local 628 number on Callata

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

If you already have a number in area code 628, 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.