Get a local business phone number in Simi Valley, CA

Area codes in Simi Valley

Simi Valley, in Ventura County, California, had a Census-estimated population of 125,778 in July 2024. NANPA lists 46 exchanges for its rate center across 2 area codes; 805 has the most (43, 93%). 805 is part of an overlay with 820, so a new local number in Simi Valley may carry any of those codes depending on which have numbers available. Simi Valley is in the Pacific time zone.

According to NANPA's dialing-plan data, local calls within 805 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.

Simi Valley exchanges by carrier

17 carriers hold the 46 exchanges assigned to Simi Valley's rate center. Pacific Bell has the most, with 14. 30 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.

Exchanges (NPA-NXX) assigned in Simi Valley

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Simi Valley's rate center (SIMIVALLEY). The earliest assignment date recorded in the file for these codes is 2001. 3 of the 46 were assigned in 2020 or later.

When Simi Valley's exchanges were assigned

The table groups Simi Valley's exchanges by the decade NANPA recorded them as assigned.

What makes a number local to Simi Valley

Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Simi Valley's numbers are rated to the SIMIVALLEY rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Simi Valley number.

Keeping an existing Simi Valley number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 805 when you pick it.

The local business market

Simi Valley is part of the Oxnard-Thousand Oaks-Ventura, CA metro area, home to 835,000 people in 2024. County Business Patterns counted 22,992 business establishments in the Oxnard, CA metro area in 2023, employing 273,697 people. The largest sectors by establishment count are health care and social assistance (3,270), professional, scientific, and technical services (3,100), and retail trade (2,552).

A Simi Valley number on Callata

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.

Porting a number you already use in Simi Valley is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

The comparison below uses 12 users, the rounded average establishment size in the Oxnard, CA metro area. At list prices checked September 28, 2026, that is $299.40 a month on Ooma Office Pro and $360.00 on RingCentral RingEX Core. Callata comes to $239.00 a month for 12 users ($99 a month with 5 users included, then $20 per additional user), below both.