CallataGuidesGet a local business phone number in San Joaquin, CA
San Joaquin's area code, prefixes and carriers from NANPA records, and how to put a San Joaquin number in front of your customers.
- Area code
- 559
- Exchanges
- 7NANPA-assigned
- Carriers
- 5
- Population
- 3,679Census 2024 est.
San Joaquin area codes
San Joaquin, in Fresno County, California, had a Census-estimated population of 3,679 in July 2024. All 7 exchanges NANPA lists for its rate center are in area code 559. 559 is part of an overlay with 357, so a new local number in San Joaquin may carry any of those codes depending on which have numbers available. San Joaquin is in the Pacific time zone.
According to NANPA's dialing-plan data, local calls within 559 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 559 | 7 | 100% | 1998 | 357 | Pacific |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
San Joaquin exchanges by carrier
5 carriers hold the 7 exchanges assigned to San Joaquin's rate center. Frontier California INC. has the most, with 3. 7 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 |
|---|---|---|
| Frontier California INC. | 3 | 43% |
| Comcast Phone of California, LLC | 1 | 14% |
| Metropcs, INC. | 1 | 14% |
| Peerless Network of California, LLC - CA | 1 | 14% |
| New Cingular Wireless PCS, LLC | 1 | 14% |
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 San Joaquin
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to San Joaquin. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 559 | 210, 364, 525, 630, 693, 698, 829 |
Source: NANPA utilized central office code file.
What makes a number local to San Joaquin
What a caller sees as "local" is the area code plus prefix. In San Joaquin, those come from the SANJOAQUIN rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 559 numbers available change over time; porting an existing number is free.
The local business market
San Joaquin is part of the Fresno, CA metro area, home to 1.2 million people in 2024. County Business Patterns counted 21,510 business establishments in the Fresno, CA metro area in 2023, employing 332,203 people. The largest sectors by establishment count are health care and social assistance (3,003), retail trade (2,752), and accommodation and food services (2,122).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 895 | 16,913 | 18.9 |
| Physician practices | 710 | 6,680 | 9.4 |
| Full-service restaurants | 586 | 11,825 | 20.2 |
| General freight trucking companies (local) | 476 | — | — |
| Dental offices | 473 | 4,077 | 8.6 |
| Law offices | 409 | 2,634 | 6.4 |
| Insurance agencies and brokerages | 387 | 2,198 | 5.7 |
| Offices of real estate agents and brokers | 334 | — | — |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in San Joaquin
Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.
Porting a number you already use in San Joaquin 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 15 users, the rounded average establishment size in the Fresno, CA metro area. At list prices checked September 28, 2026, that is $374.25 a month on Ooma Office Pro and $450.00 on RingCentral RingEX Core. Callata comes to $299.00 a month for 15 users ($99 a month with 5 users included, then $20 per additional user), below both.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $299.00 | $3,588.00 |
| Quo (Starter) | $19.00 per user | $285.00 | $3,420.00 |
| Nextiva (Core) | $23.00 per user | $345.00 | $4,140.00 |
| Ooma (Office Pro) | $24.95 per user | $374.25 | $4,491.00 |
| Dialpad (Standard) | $27.00 per user | $405.00 | $4,860.00 |
| RingCentral (RingEX Core) | $30.00 per user | $450.00 | $5,400.00 |
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 San Joaquin, CA?
559. All exchanges NANPA lists for San Joaquin are in 559.
How many phone companies have exchanges in San Joaquin?
5, holding 7 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing San Joaquin 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 San Joaquin?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 15 users come to $299.00 a month. For comparison, 15 users on RingCentral RingEX Core list at $450.00 a month (checked September 28, 2026).