Get a local business phone number in Monrovia, CA

What area code is Monrovia, CA?

Monrovia city is a Census place in Los Angeles County, California, with an estimated 37,787 residents in 2024. All 34 exchanges NANPA lists for its rate center are in area code 626. Monrovia is in the Pacific time zone.

According to NANPA's dialing-plan data, local calls within 626 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.

Monrovia exchanges by carrier

13 carriers hold the 34 exchanges assigned to Monrovia's rate center. Frontier California INC. has the most, with 11. 26 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. Holding a code means NANPA assigned that block of numbers to the carrier for this rate center; individual numbers may since have been ported elsewhere.

Monrovia phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Monrovia's rate center (MONROVIA). The earliest assignment date recorded in the file for these codes is 2001. 6 of the 34 were assigned in 2020 or later.

When Monrovia's exchanges were assigned

Assignment dates show when each block of Monrovia numbers was added to the local supply.

What makes a number local to Monrovia

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

If your business already has a Monrovia number, porting it to Callata is free and keeps it on your cards, listings and vehicles.

Businesses around Monrovia

Monrovia is part of the Los Angeles-Long Beach-Anaheim, CA metro area, home to 12.9 million people in 2024. County Business Patterns counted 411,949 business establishments in the Los Angeles, CA metro area in 2023, employing 5,568,514 people. The largest sectors by establishment count are professional, scientific, and technical services (61,848), health care and social assistance (53,869), and retail trade (38,838).

Business phone service in Monrovia

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 Monrovia, 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.

A 14-person team is the benchmark here, the rounded average establishment size in the Los Angeles, CA metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $420.00 a month and Ooma Office Pro $349.30. On Callata the same 14 people cost $279.00 a month, less than either per-seat plan.