CallataGuidesGet a local business phone number in Sierra Vista, AZ
Sierra Vista's area code, prefixes and carriers from NANPA records, and how to put a Sierra Vista number in front of your customers.
- Area code
- 520
- Exchanges
- 70NANPA-assigned
- Carriers
- 16
- Population
- 44,710Census 2024 est.
What area code is Sierra Vista, AZ?
With 44,710 residents in the Census 2024 estimate, Sierra Vista sits in Cochise County, Arizona. All 70 exchanges NANPA lists for its rate center are in area code 520. Sierra Vista is in the Mountain time zone.
According to NANPA's dialing-plan data, local calls within 520 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 520 | 70 | 100% | 1995 | none | Mountain |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Sierra Vista
16 carriers hold the 70 exchanges assigned to Sierra Vista's rate center. Mcimetro Access Transmission Services LLC - Az has the most, with 20. 55 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 |
|---|---|---|
| Mcimetro Access Transmission Services LLC - Az | 20 | 29% |
| Qwest Corporation | 12 | 17% |
| Teleport Communications America, LLC - Az | 10 | 14% |
| T-mobile USA, INC. | 8 | 11% |
| Cellco Partnership d/b/a Verizon Wireless - Az | 5 | 7.1% |
| Comcast Ip Phone, LLC | 3 | 4.3% |
| Metropcs, INC. | 2 | 2.9% |
| Onvoy, LLC - Az | 2 | 2.9% |
| Electric Lightwave LLC d/b/a Allstream | 1 | 1.4% |
| Level 3 Communications, LLC - Az | 1 | 1.4% |
| North County Communications Corporation | 1 | 1.4% |
| Commio, LLC | 1 | 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.
Local prefixes for Sierra Vista
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Sierra Vista. The earliest assignment date recorded in the file for these codes is 2001. 38 of the 70 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 520 | 220, 224, 226, 227, 234, 236, 249, 255, 263, 266, 267, 335, 376, 378, 417, 439, 452, 454, 456, 458, 459, 473, 504, 508, 515, 523, 533, 538, 556, 559, 654, 669, 671, 672, 673, 674, 678, 684, 685, 687, 691, 692, 693, 699, 706, 707, 708, 713, 714, 715, 716, 717, 718, 725, 732, 735, 737, 803, 843, 851, 852, 853, 854, 855, 895, 941, 942, 943, 944, 945 |
Source: NANPA utilized central office code file.
When Sierra Vista's exchanges were assigned
The table groups Sierra Vista's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 9 | 19% |
| 2010s | 1 | 2.1% |
| 2020s | 38 | 79% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Sierra Vista
NANPA ties every exchange to a rate center. For Sierra Vista that is SIERRAVIST, so a number from one of these exchanges reads as local to people in and around Sierra Vista.
New local numbers are drawn from carrier inventory, so the exact 520 numbers available change over time; porting an existing number is free.
Who does business near Sierra Vista
Sierra Vista is part of the Sierra Vista-Douglas, AZ metro area, home to 126,000 people in 2024. County Business Patterns counted 2,189 business establishments in the Sierra Vista, AZ metro area in 2023, employing 26,077 people. The largest sectors by establishment count are retail trade (366), health care and social assistance (275), and accommodation and food services (272).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 80 | 1,348 | 16.9 |
| Limited-service restaurants | 71 | 1,369 | 19.3 |
| Offices of real estate agents and brokers | 45 | 80 | 1.8 |
| Plumbing, heating and air-conditioning contractors | 44 | 248 | 5.6 |
| Physician practices | 41 | 434 | 10.6 |
| Hotels and motels | 41 | 561 | 13.7 |
| General automotive repair shops | 32 | 125 | 3.9 |
| Residential remodelers | 31 | 150 | 4.8 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Sierra Vista
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 Sierra Vista 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.
Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Sierra Vista, AZ metro area, 12 users on RingCentral RingEX Core come to $360.00 a month and on Ooma Office Pro $299.40, at month-to-month list prices checked September 28, 2026. Callata comes to $239.00 a month for 12 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 | $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 Sierra Vista, AZ?
520. All exchanges NANPA lists for Sierra Vista are in 520.
How many phone companies have exchanges in Sierra Vista?
16, holding 70 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Sierra Vista 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 Sierra Vista?
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).