CallataGuidesGet a local business phone number in King City, CA
King City's area code, prefixes and carriers from NANPA records, and how to put a King City number in front of your customers.
- Area code
- 831
- Exchanges
- 7NANPA-assigned
- Carriers
- 6
- Population
- 13,920Census 2024 est.
Area codes in King City
King City, in Monterey County, California, had a Census-estimated population of 13,920 in July 2024. All 7 exchanges NANPA lists for its rate center are in area code 831. King City is in the Pacific time zone.
According to NANPA's dialing-plan data, local calls within 831 are dialed as seven digits and toll calls as seven digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 831 | 7 | 100% | 1998 | none | Pacific |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in King City
6 carriers hold the 7 exchanges assigned to King City's rate center. Pacific Bell has the most, with 2. 6 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in King City 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 | 2 | 29% |
| Ip Horizon LLC | 1 | 14% |
| Bandwidth.com CLEC, LLC - CA | 1 | 14% |
| Level 3 Communications, LLC - CA | 1 | 14% |
| Onvoy, LLC - CA | 1 | 14% |
| Onvoy Spectrum, 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 King City
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to King City. The earliest assignment date recorded in the file for these codes is 2020. 2 of the 7 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 831 | 263, 385, 386, 387, 525, 830, 931 |
Source: NANPA utilized central office code file.
How local numbers work in King City
What a caller sees as "local" is the area code plus prefix. In King City, those come from the KING CITY rate center, as recorded by NANPA.
Keeping an existing King City number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 831 when you pick it.
The local business market
King City is part of the Salinas, CA metro area, home to 436,000 people in 2024. County Business Patterns counted 9,212 business establishments in the Salinas, CA metro area in 2023, employing 116,784 people. The largest sectors by establishment count are retail trade (1,276), accommodation and food services (1,120), and construction (1,107).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 380 | 7,385 | 19.4 |
| Limited-service restaurants | 305 | 5,469 | 17.9 |
| Physician practices | 256 | 1,743 | 6.8 |
| Residential remodelers | 238 | 1,065 | 4.5 |
| Hotels and motels | 192 | 6,362 | 33.1 |
| Dental offices | 183 | 1,365 | 7.5 |
| Landscaping services | 165 | 1,006 | 6.1 |
| Law offices | 141 | 646 | 4.6 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in King City
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.
If you already have a number in King City, 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 Salinas, CA metro area, 13 users on RingCentral RingEX Core come to $390.00 a month and on Ooma Office Pro $324.35, at month-to-month list prices checked September 28, 2026. 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 King City, CA?
831. All exchanges NANPA lists for King City are in 831.
How many phone companies have exchanges in King City?
6, holding 7 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing King City 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 King City?
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).