CallataGuidesGet a local business phone number in California, PA
California's area codes, prefixes and carriers from NANPA records, and how to put a California number in front of your customers.
- Area code
- 724 / 878
- Exchanges
- 5NANPA-assigned
- Carriers
- 4
- Population
- 4,628Census 2024 est.
California area codes
California, in Washington County, Pennsylvania, had a Census-estimated population of 4,628 in July 2024. NANPA lists 5 exchanges for its rate center across 2 area codes; 724 has the most (4, 80%). 724 is part of an overlay with 878, so a new local number in California may carry any of those codes depending on which have numbers available. California is in the Eastern time zone.
According to NANPA's dialing-plan data, local calls within 724 are dialed as ten digits (area code plus number) and toll calls as ten digits (area code plus number).
California exchanges by carrier
4 carriers hold the 5 exchanges assigned to California's rate center. Level 3 Communications, LLC - Pa has the most, with 2. 4 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 |
|---|---|---|
| Level 3 Communications, LLC - Pa | 2 | 40% |
| Teleport Communications America, LLC - Pa | 1 | 20% |
| Verizon Pennsylvania, INC. | 1 | 20% |
| Bandwidth.com CLEC, LLC - Pa | 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 California
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to California's rate center (CALIFORNIA). The earliest assignment date recorded in the file for these codes is 2022. 1 of the 5 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 724 | 330, 648, 769, 938 |
| 878 | 265 |
Source: NANPA utilized central office code file.
Rate centers and local calling in California
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. California's numbers are rated to the CALIFORNIA rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a California number.
If your business already has a California number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
Businesses around California
California is part of the Pittsburgh, PA metro area, home to 2.4 million people in 2024. County Business Patterns counted 61,628 business establishments in the Pittsburgh, PA metro area in 2023, employing 1,122,366 people. The largest sectors by establishment count are health care and social assistance (8,680), retail trade (7,718), and other services (except public administration) (7,410).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Physician practices | 1,972 | — | — |
| Limited-service restaurants | 1,944 | 30,573 | 15.7 |
| Full-service restaurants | 1,851 | 43,054 | 23.3 |
| Residential remodelers | 1,107 | 4,004 | 3.6 |
| Beauty salons | 1,063 | 5,533 | 5.2 |
| Law offices | 1,050 | 8,740 | 8.3 |
| Landscaping services | 1,033 | 4,552 | 4.4 |
| Insurance agencies and brokerages | 1,031 | 6,015 | 5.8 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A California number on Callata
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 California 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.
An 18-person team is the benchmark here, the rounded average establishment size in the Pittsburgh, PA metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $540.00 a month and Ooma Office Pro $449.10. Callata comes to $359.00 a month for 18 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 | $359.00 | $4,308.00 |
| Quo (Starter) | $19.00 per user | $342.00 | $4,104.00 |
| Nextiva (Core) | $23.00 per user | $414.00 | $4,968.00 |
| Ooma (Office Pro) | $24.95 per user | $449.10 | $5,389.20 |
| Dialpad (Standard) | $27.00 per user | $486.00 | $5,832.00 |
| RingCentral (RingEX Core) | $30.00 per user | $540.00 | $6,480.00 |
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 California, PA?
California has exchanges in 724 and 878; 724 has the most.
How many phone companies have exchanges in California?
4, holding 5 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing California 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 California?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 18 users come to $359.00 a month. For comparison, 18 users on RingCentral RingEX Core list at $540.00 a month (checked September 28, 2026).