CallataGuidesGet a local business phone number in Palo Alto, CA
Palo Alto's area code, prefixes and carriers from NANPA records, and how to put a Palo Alto number in front of your customers.
- Area code
- 650
- Exchanges
- 145NANPA-assigned
- Carriers
- 22
- Population
- 67,658Census 2024 est.
Area codes in Palo Alto
With 67,658 residents in the Census 2024 estimate, Palo Alto sits in Santa Clara County, California. All 145 exchanges NANPA lists for its rate center are in area code 650. Palo Alto is in the Pacific time zone.
According to NANPA's dialing-plan data, local calls within 650 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 |
|---|---|---|---|---|---|
| 650 | 145 | 100% | 1997 | none | Pacific |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Palo Alto
22 carriers hold the 145 exchanges assigned to Palo Alto's rate center. Pacific Bell has the most, with 56. 101 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 |
|---|---|---|
| Pacific Bell | 56 | 39% |
| New Cingular Wireless PCS, LLC | 15 | 10% |
| Level 3 Communications, LLC - CA | 13 | 9.0% |
| T-mobile USA, INC. | 11 | 7.6% |
| Cellco Partnership d/b/a Verizon Wireless - CA | 10 | 6.9% |
| Mcimetro Access Transmission Services LLC | 7 | 4.8% |
| Onvoy, LLC - CA | 6 | 4.1% |
| Metropcs, INC. | 5 | 3.4% |
| Teleport Communications America, LLC - CA | 4 | 2.8% |
| U.s. Telepacific Corp. d/b/a TPX Communications | 3 | 2.1% |
| Bandwidth.com CLEC, LLC - CA | 2 | 1.4% |
| Level 3 Telecom of California, LP - CA | 2 | 1.4% |
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 Palo Alto
These are the central office codes NANPA records for Palo Alto. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 10 of the 145 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 650 | 213, 223, 233, 234, 236, 248, 250, 251, 252, 258, 269, 272, 283, 285, 289, 300, 304, 308, 313, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 334, 352, 353, 354, 370, 374, 380, 382, 384, 387, 388, 391, 407, 422, 424, 427, 433, 441, 444, 460, 461, 462, 463, 468, 470, 473, 475, 485, 493, 494, 496, 497, 498, 505, 507, 509, 512, 519, 521, 531, 543, 546, 561, 565, 566, 575, 586, 600, 606, 613, 614, 617, 618, 621, 630, 643, 644, 646, 656, 665, 666, 681, 682, 687, 688, 690, 698, 702, 704, 709, 714, 721, 723, 724, 725, 736, 739, 752, 776, 785, 788, 792, 796, 798, 799, 800, 804, 812, 813, 814, 815, 833, 838, 842, 843, 845, 846, 847, 849, 852, 853, 854, 855, 856, 857, 858, 859, 862, 885, 906, 924, 926, 999 |
Source: NANPA utilized central office code file.
When Palo Alto's exchanges were assigned
Assignment dates show when each block of Palo Alto numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 7 | 17% |
| 2010s | 25 | 60% |
| 2020s | 10 | 24% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Rate centers and local calling in Palo Alto
What a caller sees as "local" is the area code plus prefix. In Palo Alto, those come from the PALO ALTO rate center, as recorded by NANPA.
Keeping an existing Palo Alto number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 650 when you pick it.
Who does business near Palo Alto
Palo Alto is part of the San Jose-Sunnyvale-Santa Clara, CA metro area, home to 2.0 million people in 2024. County Business Patterns counted 50,322 business establishments in the San Jose, CA metro area in 2023, employing 1,185,619 people. The largest sectors by establishment count are professional, scientific, and technical services (8,761), health care and social assistance (6,467), and accommodation and food services (5,230).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 1,743 | 32,332 | 18.5 |
| Limited-service restaurants | 1,647 | 28,627 | 17.4 |
| Custom computer programming services firms | 1,640 | 52,263 | 31.9 |
| Dental offices | 1,566 | 9,786 | 6.2 |
| Physician practices | 1,164 | 10,553 | 9.1 |
| Offices of real estate agents and brokers | 1,159 | 3,412 | 2.9 |
| Residential remodelers | 914 | 4,459 | 4.9 |
| Computer systems design services firms | 902 | 24,542 | 27.2 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Palo Alto business line
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 Palo Alto, 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 San Jose, CA metro area, 24 users on RingCentral RingEX Core come to $720.00 a month and on Ooma Office Pro $598.80, at month-to-month list prices checked September 28, 2026. On Callata the same 24 people cost $479.00 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 | $479.00 | $5,748.00 |
| Quo (Starter) | $19.00 per user | $456.00 | $5,472.00 |
| Nextiva (Core) | $23.00 per user | $552.00 | $6,624.00 |
| Ooma (Office Pro) | $24.95 per user | $598.80 | $7,185.60 |
| Dialpad (Standard) | $27.00 per user | $648.00 | $7,776.00 |
| RingCentral (RingEX Core) | $30.00 per user | $720.00 | $8,640.00 |
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 Palo Alto, CA?
650. All exchanges NANPA lists for Palo Alto are in 650.
How many phone companies have exchanges in Palo Alto?
22, holding 145 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Palo Alto 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 Palo Alto?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 24 users come to $479.00 a month. For comparison, 24 users on RingCentral RingEX Core list at $720.00 a month (checked September 28, 2026).