Area code 310

Where area code 310 is

NANPA lists 310 as an in-service geographic area code for California, first put into service on November 2, 1991. It is an overlay: 310 and 424 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 Beverly Hills, Inglewood, El Segundo, Culver City, and Torrance. By population, its largest named places are Torrance, Inglewood, Hawthorne, Lakewood, and Culver City.

Places served by 310

310 holds 3.6% of the 22,087 central office codes assigned in California, the 3rd most of the state's 41 codes. 10 Census places could be matched to rate centers with 310 exchanges; the most populous are Torrance (140,000), Inglewood (103,000), Hawthorne (83,633), and Lakewood (78,494). For a storefront or service area inside 310, the place pages show which prefixes are rated local there.

Dialing 310 numbers

According to NANPA's dialing-plan data, local calls within 310 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 310 exchanges

25 carriers hold the 786 central office codes assigned in 310. Pacific Bell has the most, with 249 (32%). 354 of the codes (45%) 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 310

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 310 has codes in 17 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 310

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). 786 are assigned in 310, 98% of 800. 10 were assigned in 2020 or later.

A local 310 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 310, 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.