CallataGuidesGet a local business phone number in Sonoma, CA
Sonoma's area codes, prefixes and carriers from NANPA records, and how to put a Sonoma number in front of your customers.
- Area code
- 707 / 369
- Exchanges
- 18NANPA-assigned
- Carriers
- 11
- Population
- 10,606Census 2024 est.
What area code is Sonoma, CA?
Sonoma, in Sonoma County, California, had a Census-estimated population of 10,606 in July 2024. NANPA lists 18 exchanges for its rate center across 2 area codes; 707 has the most (16, 89%). 707 is part of an overlay with 369, so a new local number in Sonoma may carry any of those codes depending on which have numbers available. Sonoma is in the Pacific time zone.
According to NANPA's dialing-plan data, local calls within 707 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.
Sonoma exchanges by carrier
11 carriers hold the 18 exchanges assigned to Sonoma's rate center. Pacific Bell has the most, with 5. 14 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Sonoma can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Pacific Bell | 5 | 28% |
| Onvoy, LLC - CA | 3 | 17% |
| Cellco Partnership d/b/a Verizon Wireless - CA | 2 | 11% |
| Shelcomm | 1 | 5.6% |
| Wide Voice, LLC - CA | 1 | 5.6% |
| Integrated Path Communications, LLC - CA | 1 | 5.6% |
| Ip Horizon LLC | 1 | 5.6% |
| U.s. Telepacific Corp. d/b/a TPX Communications | 1 | 5.6% |
| Metropcs, INC. | 1 | 5.6% |
| Teleport Communications America, LLC - CA | 1 | 5.6% |
| Mcimetro Access Transmission Services LLC | 1 | 5.6% |
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.
Sonoma phone prefixes
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Sonoma's rate center (SONOMA). The earliest assignment date recorded in the file for these codes is 2016. 4 of the 18 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 369 | 220, 777 |
| 707 | 210, 231, 309, 343, 509, 721, 732, 931, 933, 934, 935, 938, 939, 940, 991, 996 |
Source: NANPA utilized central office code file.
When Sonoma's exchanges were assigned
Assignment dates show when each block of Sonoma numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2010s | 1 | 20% |
| 2020s | 4 | 80% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
What makes a number local to Sonoma
What a caller sees as "local" is the area code plus prefix. In Sonoma, those come from the SONOMA rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 707 numbers available change over time; porting an existing number is free.
Businesses around Sonoma
Sonoma is part of the Santa Rosa-Petaluma, CA metro area, home to 485,000 people in 2024. County Business Patterns counted 14,572 business establishments in the Santa Rosa, CA metro area in 2023, employing 177,367 people. The largest sectors by establishment count are construction (2,253), health care and social assistance (1,671), and professional, scientific, and technical services (1,653).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 511 | 9,018 | 17.6 |
| Residential remodelers | 481 | 1,980 | 4.1 |
| Limited-service restaurants | 354 | 5,778 | 16.3 |
| Wineries | 327 | 6,159 | 18.8 |
| Landscaping services | 301 | 2,645 | 8.8 |
| Dental offices | 282 | 2,175 | 7.7 |
| Plumbing, heating and air-conditioning contractors | 262 | 2,054 | 7.8 |
| Physician practices | 245 | 2,693 | 11.0 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Sonoma
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 Sonoma, 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 12-person team is the benchmark here, the rounded average establishment size in the Santa Rosa, CA metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $360.00 a month and Ooma Office Pro $299.40. On Callata the same 12 people cost $239.00 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 | $239.00 | $2,868.00 |
| Quo (Starter) | $19.00 per user | $228.00 | $2,736.00 |
| Nextiva (Core) | $23.00 per user | $276.00 | $3,312.00 |
| Ooma (Office Pro) | $24.95 per user | $299.40 | $3,592.80 |
| Dialpad (Standard) | $27.00 per user | $324.00 | $3,888.00 |
| RingCentral (RingEX Core) | $30.00 per user | $360.00 | $4,320.00 |
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 Sonoma, CA?
Sonoma has exchanges in 707 and 369; 707 has the most.
How many phone companies have exchanges in Sonoma?
11, holding 18 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Sonoma 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 Sonoma?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 12 users come to $239.00 a month. For comparison, 12 users on RingCentral RingEX Core list at $360.00 a month (checked September 28, 2026).