Phone numbers in Sioux City, Iowa
Sioux City has 73 phone prefixes in area code 712.
Biggest holders: AT&T Mobility, CenturyLink / Lumen, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 21%
- Internet / business phone carrier 29%
- Phone company 12%
Every prefix in Sioux City
Search the first six digits of a number in this list. If it's here, the number started in Sioux City with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-202 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 712-203 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 712-204 | T-Mobile (including Sprint) | Mobile carrier | – |
| 712-212 | MCImetro (Verizon Business) | Internet / business phone carrier | 2004 |
| 712-222 | Long Lines Metro | Phone company | 2003 |
| 712-223 | AT&T Mobility | Mobile carrier | – |
| 712-224 | Imon Communications | Phone company | – |
| 712-226 | Imon Communications | Phone company | – |
| 712-233 | CenturyLink / Lumen | Local phone company | – |
| 712-234 | CenturyLink / Lumen | Local phone company | – |
| 712-238 | Long Lines Metro | Phone company | 2002 |
| 712-239 | CenturyLink / Lumen | Local phone company | – |
| 712-244 | Long Lines Metro | Phone company | – |
| 712-245 | AT&T Mobility | Mobile carrier | 2024 |
| 712-251 | Verizon Wireless | Mobile carrier | – |
| 712-252 | CenturyLink / Lumen | Local phone company | – |
| 712-253 | Verizon Wireless | Mobile carrier | – |
| 712-255 | CenturyLink / Lumen | Local phone company | – |
| 712-258 | CenturyLink / Lumen | Local phone company | – |
| 712-259 | AT&T Mobility | Mobile carrier | – |
| 712-266 | CenturyLink / Lumen | Local phone company | – |
| 712-274 | CenturyLink / Lumen | Local phone company | – |
| 712-276 | CenturyLink / Lumen | Local phone company | – |
| 712-277 | CenturyLink / Lumen | Local phone company | – |
| 712-279 | CenturyLink / Lumen | Local phone company | – |
| 712-281 | AT&T Mobility | Mobile carrier | – |
| 712-293 | CenturyLink / Lumen | Local phone company | – |
| 712-294 | CenturyLink / Lumen | Local phone company | – |
| 712-301 | T-Mobile (including Sprint) | Mobile carrier | – |
| 712-317 | Airus | Phone company | 2019 |
| 712-333 | AT&T Mobility | Mobile carrier | 2006 |
| 712-389 | AT&T (local phone) | Local phone company | – |
| 712-413 | AT&T Mobility | Mobile carrier | 2021 |
| 712-418 | Comcast | Internet / business phone carrier | 2023 |
| 712-444 | AT&T Mobility | Mobile carrier | 2007 |
| 712-454 | Teleport Communications America | Internet / business phone carrier | 2009 |
| 712-490 | Verizon Wireless | Mobile carrier | – |
| 712-491 | Onvoy | Internet / business phone carrier | 2026 |
| 712-493 | AT&T Mobility | Mobile carrier | 2026 |
| 712-499 | Fractel | Internet / business phone carrier | 2021 |
| 712-502 | AT&T Mobility | Mobile carrier | 2024 |
| 712-503 | Wavenation | Phone company | 2025 |
| 712-509 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 712-510 | Edgetel | Phone company | 2025 |
| 712-522 | AT&T Mobility | Mobile carrier | 2010 |
| 712-535 | CenturyLink / Lumen | Local phone company | 2016 |
| 712-560 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 712-564 | IP Horizon | Internet / business phone carrier | 2021 |
| 712-569 | Telnyx | Internet / business phone carrier | 2019 |
| 712-570 | Commio | Internet / business phone carrier | 2024 |
| 712-574 | AT&T Mobility | Mobile carrier | 2001 |
| 712-577 | T-Mobile (including Sprint) | Mobile carrier | 2006 |
| 712-587 | Level 3 (Lumen) | Internet / business phone carrier | 2008 |
| 712-613 | Wide Voice | Phone company | 2019 |
| 712-635 | Verizon Wireless | Mobile carrier | 2009 |
| 712-639 | Vonage America | Internet / business phone carrier | 2018 |
| 712-666 | Fractel | Internet / business phone carrier | 2020 |
| 712-670 | AT&T Mobility | Mobile carrier | 2024 |
| 712-685 | Csc Wireless | Mobile carrier | 2020 |
| 712-710 | Commio | Internet / business phone carrier | 2021 |
| 712-717 | Onvoy | Internet / business phone carrier | 2018 |
| 712-740 | Verizon Wireless | Mobile carrier | 2025 |
| 712-791 | Onvoy | Internet / business phone carrier | 2025 |
| 712-812 | Hd Carrier | Internet / business phone carrier | 2025 |
| 712-833 | Terra Nova Telecom | Internet / business phone carrier | 2021 |
| 712-895 | Twilio | Internet / business phone carrier | 2021 |
| 712-898 | Verizon Wireless | Mobile carrier | – |
| 712-899 | Verizon Wireless | Mobile carrier | – |
| 712-925 | Verizon Wireless | Mobile carrier | 2023 |
| 712-927 | AT&T Mobility | Mobile carrier | 2019 |
| 712-929 | AT&T Mobility | Mobile carrier | 2024 |
| 712-937 | Nuso | Internet / business phone carrier | 2023 |
| 712-991 | Bandwidth | Internet / business phone carrier | 2025 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.