Area code 820

Area code 820 at a glance

820 is one of 41 geographic area codes serving California; NANPA records its in-service date as June 30, 2018. It is an overlay: 820 and 805 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 Camarillo, Oxnard, Atascadero, Santa Barbara, and Santa Maria. By population, its largest named places are Oxnard, Simi Valley, Thousand Oaks, Santa Maria, and Santa Barbara.

Cities and towns in area code 820

820 holds 0.44% of the 22,087 central office codes assigned in California, the 36th most of the state's 41 codes. 15 Census places could be matched to rate centers with 820 exchanges; the most populous are Oxnard (201,000), Simi Valley (126,000), Thousand Oaks (124,000), and Santa Maria (111,000). For a storefront or service area inside 820, the place pages show which prefixes are rated local there.

Ten-digit and seven-digit dialing in 820

According to NANPA's dialing-plan data, local calls within 820 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 820 numbers

22 carriers hold the 98 central office codes assigned in 820. Fractel, LLC has the most, with 32 (33%). 97 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.

Local calling areas in 820

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 820 has codes in 31 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 820?

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). 98 are assigned in 820, 12% of 800. 81 were assigned in 2020 or later.

A local 820 number on Callata

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in area code 820, 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.