CallataGuidesGet a local business phone number in El Segundo, CA
El Segundo's area codes, prefixes and carriers from NANPA records, and how to put a El Segundo number in front of your customers.
- Area code
- 310 / 424
- Exchanges
- 57NANPA-assigned
- Carriers
- 16
- Population
- 16,544Census 2024 est.
What area code is El Segundo, CA?
El Segundo city is a Census place in Los Angeles County, California, with an estimated 16,544 residents in 2024. NANPA lists 57 exchanges for its rate center across 2 area codes; 310 has the most (39, 68%). 310 is part of an overlay with 424, so a new local number in El Segundo may carry any of those codes depending on which have numbers available. El Segundo is in the Pacific time zone.
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.
El Segundo exchanges by carrier
16 carriers hold the 57 exchanges assigned to El Segundo's rate center. Pacific Bell has the most, with 24. 40 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.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Pacific Bell | 24 | 42% |
| Teleport Communications America, LLC - CA | 6 | 11% |
| Level 3 Communications, LLC - CA | 4 | 7.0% |
| T-mobile USA, INC. | 3 | 5.3% |
| Mcimetro Access Transmission Services LLC - CA | 3 | 5.3% |
| Bandwidth.com CLEC, LLC - CA | 3 | 5.3% |
| U.s. Telepacific Corp. d/b/a TPX Communications | 2 | 3.5% |
| New Cingular Wireless PCS, LLC | 2 | 3.5% |
| Peerless Network of California, LLC - CA | 2 | 3.5% |
| Cellco Partnership d/b/a Verizon Wireless - CA | 2 | 3.5% |
| Level 3 Telecom of California, LP - CA | 1 | 1.8% |
| Mcimetro Access Transmission Services LLC | 1 | 1.8% |
Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.
El Segundo phone prefixes
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to El Segundo's rate center (EL SEGUNDO). The earliest assignment date recorded in the file for these codes is 2001. 5 of the 57 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 310 | 227, 252, 321, 322, 333, 334, 335, 336, 341, 343, 356, 364, 414, 416, 426, 469, 524, 529, 535, 563, 565, 606, 607, 615, 616, 640, 647, 648, 653, 658, 662, 726, 744, 760, 765, 797, 906, 955, 964 |
| 424 | 217, 218, 220, 225, 277, 290, 301, 321, 367, 397, 405, 423, 499, 502, 544, 557, 678, 850 |
Source: NANPA utilized central office code file.
When El Segundo's exchanges were assigned
Assignment dates show when each block of El Segundo numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 5 | 25% |
| 2010s | 10 | 50% |
| 2020s | 5 | 25% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
What makes a number local to El Segundo
What a caller sees as "local" is the area code plus prefix. In El Segundo, those come from the EL SEGUNDO rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 310 numbers available change over time; porting an existing number is free.
Businesses around El Segundo
El Segundo 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).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Physician practices | 13,775 | 86,725 | 6.3 |
| Limited-service restaurants | 12,756 | 218,098 | 17.1 |
| Law offices | 11,330 | 74,795 | 6.6 |
| Full-service restaurants | 11,133 | 237,368 | 21.3 |
| Dental offices | 9,296 | 50,762 | 5.5 |
| Offices of real estate agents and brokers | 8,931 | 19,620 | 2.2 |
| Management consulting firms | 8,377 | 36,309 | 4.3 |
| Insurance agencies and brokerages | 5,786 | 31,913 | 5.5 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in El Segundo
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.
If you already have a number in El Segundo, 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.
Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Los Angeles, CA metro area, 14 users on RingCentral RingEX Core come to $420.00 a month and on Ooma Office Pro $349.30, at month-to-month list prices checked September 28, 2026. On Callata the same 14 people cost $279.00 a month, less than either per-seat plan.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $279.00 | $3,348.00 |
| Quo (Starter) | $19.00 per user | $266.00 | $3,192.00 |
| Nextiva (Core) | $23.00 per user | $322.00 | $3,864.00 |
| Ooma (Office Pro) | $24.95 per user | $349.30 | $4,191.60 |
| Dialpad (Standard) | $27.00 per user | $378.00 | $4,536.00 |
| RingCentral (RingEX Core) | $30.00 per user | $420.00 | $5,040.00 |
Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.
Frequently asked questions
What area code is El Segundo, CA?
El Segundo has exchanges in 310 and 424; 310 has the most.
How many phone companies have exchanges in El Segundo?
16, holding 57 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing El Segundo business number?
Yes. Porting an existing number to Callata is free. Texting from it starts after carrier registration (10DLC), a one-time $49 fee.
How much is a business phone line in El Segundo?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 14 users come to $279.00 a month. For comparison, 14 users on RingCentral RingEX Core list at $420.00 a month (checked September 28, 2026).