CallataGuidesGet a local business phone number in Holtville, CA
Holtville's area codes, prefixes and carriers from NANPA records, and how to put a Holtville number in front of your customers.
- Area code
- 760 / 442
- Exchanges
- 5NANPA-assigned
- Carriers
- 4
- Population
- 5,612Census 2024 est.
Holtville area codes
Holtville city is a Census place in Imperial County, California, with an estimated 5,612 residents in 2024. NANPA lists 5 exchanges for its rate center across 2 area codes; 760 has the most (4, 80%). 760 is part of an overlay with 442, so a new local number in Holtville may carry any of those codes depending on which have numbers available. Holtville is in the Pacific time zone.
According to NANPA's dialing-plan data, local calls within 760 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.
Phone carriers in Holtville
4 carriers hold the 5 exchanges assigned to Holtville's rate center. Onvoy, LLC - CA has the most, with 2. 5 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.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Onvoy, LLC - CA | 2 | 40% |
| Commio, LLC | 1 | 20% |
| Pacific Bell | 1 | 20% |
| Bandwidth.com CLEC, LLC - CA | 1 | 20% |
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.
Exchanges (NPA-NXX) assigned in Holtville
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Holtville. The earliest assignment date recorded in the file for these codes is 2013. 1 of the 5 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 442 | 345 |
| 760 | 319, 356, 528, 756 |
Source: NANPA utilized central office code file.
When Holtville's exchanges were assigned
Assignment dates show when each block of Holtville numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2010s | 1 | 50% |
| 2020s | 1 | 50% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
What makes a number local to Holtville
What a caller sees as "local" is the area code plus prefix. In Holtville, those come from the HOLTVILLE rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 760 numbers available change over time; porting an existing number is free.
Businesses around Holtville
Holtville is part of the El Centro, CA metro area, home to 182,000 people in 2024. County Business Patterns counted 2,677 business establishments in the El Centro, CA metro area in 2023, employing 34,323 people. The largest sectors by establishment count are retail trade (437), health care and social assistance (328), and accommodation and food services (272).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 110 | 2,133 | 19.4 |
| Physician practices | 84 | 872 | 10.4 |
| Full-service restaurants | 73 | 1,275 | 17.5 |
| Residential property managers | 62 | — | — |
| Insurance agencies and brokerages | 58 | 193 | 3.3 |
| General freight trucking companies (local) | 53 | 158 | 3.0 |
| Child day care services | 48 | 173 | 3.6 |
| Plumbing, heating and air-conditioning contractors | 35 | 297 | 8.5 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Holtville
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 Holtville, 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.
The comparison below uses 13 users, the rounded average establishment size in the El Centro, CA metro area. At list prices checked September 28, 2026, that is $324.35 a month on Ooma Office Pro and $390.00 on RingCentral RingEX Core. On Callata the same 13 people cost $259.00 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 | $259.00 | $3,108.00 |
| Quo (Starter) | $19.00 per user | $247.00 | $2,964.00 |
| Nextiva (Core) | $23.00 per user | $299.00 | $3,588.00 |
| Ooma (Office Pro) | $24.95 per user | $324.35 | $3,892.20 |
| Dialpad (Standard) | $27.00 per user | $351.00 | $4,212.00 |
| RingCentral (RingEX Core) | $30.00 per user | $390.00 | $4,680.00 |
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 Holtville, CA?
Holtville has exchanges in 760 and 442; 760 has the most.
How many phone companies have exchanges in Holtville?
4, holding 5 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Holtville 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 Holtville?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 13 users come to $259.00 a month. For comparison, 13 users on RingCentral RingEX Core list at $390.00 a month (checked September 28, 2026).