CallataGuidesGet a local business phone number in Sioux City, IA
Sioux City's area code, prefixes and carriers from NANPA records, and how to put a Sioux City number in front of your customers.
- Area code
- 712
- Exchanges
- 73NANPA-assigned
- Carriers
- 29
- Population
- 86,875Census 2024 est.
What area code is Sioux City, IA?
With 86,875 residents in the Census 2024 estimate, Sioux City sits in Woodbury County, Iowa. All 73 exchanges NANPA lists for its rate center are in area code 712. Sioux City is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 712 are dialed as seven digits and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 712 | 73 | 100% | 1947 | none | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Sioux City
29 carriers hold the 73 exchanges assigned to Sioux City's rate center. New Cingular Wireless PCS, LLC - Il has the most, with 14. 52 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 |
|---|---|---|
| New Cingular Wireless PCS, LLC - Il | 14 | 19% |
| Qwest Corporation | 13 | 18% |
| Cellco Partnership d/b/a Verizon Wireless - Ia | 8 | 11% |
| T-mobile USA, INC. | 5 | 6.8% |
| Long Lines Metro, INC. - Ia | 3 | 4.1% |
| Onvoy, LLC - Ia | 3 | 4.1% |
| Imon Communications LLC | 2 | 2.7% |
| Fractel, LLC | 2 | 2.7% |
| Level 3 Communications, LLC - Ia | 2 | 2.7% |
| Commio, LLC | 2 | 2.7% |
| Paetec Itel, LLC | 1 | 1.4% |
| Mcimetro Access Transmission Services 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 Sioux City
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Sioux City. The earliest assignment date recorded in the file for these codes is 2001. 24 of the 73 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 712 | 202, 203, 204, 212, 222, 223, 224, 226, 233, 234, 238, 239, 244, 245, 251, 252, 253, 255, 258, 259, 266, 274, 276, 277, 279, 281, 293, 294, 301, 317, 333, 389, 413, 418, 444, 454, 490, 491, 493, 499, 502, 503, 509, 510, 522, 535, 560, 564, 569, 570, 574, 577, 587, 613, 635, 639, 666, 670, 685, 710, 717, 740, 791, 812, 833, 895, 898, 899, 925, 927, 929, 937, 991 |
Source: NANPA utilized central office code file.
When Sioux City's exchanges were assigned
The table groups Sioux City's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 13 | 28% |
| 2010s | 9 | 20% |
| 2020s | 24 | 52% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Sioux City
NANPA ties every exchange to a rate center. For Sioux City that is SIOUX CITY, so a number from one of these exchanges reads as local to people in and around Sioux City.
New local numbers are drawn from carrier inventory, so the exact 712 numbers available change over time; porting an existing number is free.
Who does business near Sioux City
Sioux City is part of the Sioux City, IA-NE-SD metro area, home to 146,000 people in 2024. County Business Patterns counted 3,604 business establishments in the Sioux City, IA-NE-SD metro area in 2023, employing 68,688 people. The largest sectors by establishment count are retail trade (500), health care and social assistance (439), and other services (except public administration) (385).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 108 | 2,063 | 19.1 |
| Full-service restaurants | 102 | 2,114 | 20.7 |
| Insurance agencies and brokerages | 88 | 403 | 4.6 |
| Physician practices | 64 | 1,683 | 26.3 |
| Law offices | 63 | 256 | 4.1 |
| Landscaping services | 61 | 178 | 2.9 |
| Plumbing, heating and air-conditioning contractors | 53 | 769 | 14.5 |
| Dental offices | 49 | 441 | 9.0 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Sioux City
Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.
Porting a number you already use in Sioux City 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.
A 19-person team is the benchmark here, the rounded average establishment size in the Sioux City, IA-NE-SD metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $570.00 a month and Ooma Office Pro $474.05. Callata comes to $379.00 a month for 19 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 | $379.00 | $4,548.00 |
| Quo (Starter) | $19.00 per user | $361.00 | $4,332.00 |
| Nextiva (Core) | $23.00 per user | $437.00 | $5,244.00 |
| Ooma (Office Pro) | $24.95 per user | $474.05 | $5,688.60 |
| Dialpad (Standard) | $27.00 per user | $513.00 | $6,156.00 |
| RingCentral (RingEX Core) | $30.00 per user | $570.00 | $6,840.00 |
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 Sioux City, IA?
712. All exchanges NANPA lists for Sioux City are in 712.
How many phone companies have exchanges in Sioux City?
29, holding 73 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Sioux 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 Sioux City?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 19 users come to $379.00 a month. For comparison, 19 users on RingCentral RingEX Core list at $570.00 a month (checked September 28, 2026).