Phone numbers in Sioux Falls, South Dakota
Sioux Falls has 92 phone prefixes in area code 605.
Biggest holders: CenturyLink / Lumen, AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 27%
- Local phone company 35%
- Internet / business phone carrier 25%
- Phone company 13%
Every prefix in Sioux Falls
Search the first six digits of a number in this list. If it's here, the number started in Sioux Falls with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-201 | AT&T Mobility | Mobile carrier | – |
| 605-212 | Verizon Wireless | Mobile carrier | 2003 |
| 605-215 | T-Mobile (including Sprint) | Mobile carrier | 2009 |
| 605-221 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 605-231 | T-Mobile (including Sprint) | Mobile carrier | – |
| 605-241 | South Dakota Network | Phone company | – |
| 605-250 | Onvoy | Internet / business phone carrier | 2017 |
| 605-251 | AT&T Mobility | Mobile carrier | – |
| 605-254 | AT&T (local phone) | Local phone company | – |
| 605-261 | Verizon Wireless | Mobile carrier | 2003 |
| 605-271 | Midcontinent Communications | Phone company | 2004 |
| 605-274 | Midcontinent Communications | Phone company | – |
| 605-275 | Midcontinent Communications | Phone company | 2002 |
| 605-305 | Telnyx | Internet / business phone carrier | 2016 |
| 605-306 | Bluepeak | Phone company | 2001 |
| 605-310 | Verizon Wireless | Mobile carrier | – |
| 605-312 | CenturyLink / Lumen | Local phone company | 2007 |
| 605-321 | Verizon Wireless | Mobile carrier | – |
| 605-322 | CenturyLink / Lumen | Local phone company | – |
| 605-323 | CenturyLink / Lumen | Local phone company | – |
| 605-328 | CenturyLink / Lumen | Local phone company | – |
| 605-330 | CenturyLink / Lumen | Local phone company | – |
| 605-331 | CenturyLink / Lumen | Local phone company | – |
| 605-332 | CenturyLink / Lumen | Local phone company | – |
| 605-333 | CenturyLink / Lumen | Local phone company | – |
| 605-334 | CenturyLink / Lumen | Local phone company | – |
| 605-335 | CenturyLink / Lumen | Local phone company | – |
| 605-336 | CenturyLink / Lumen | Local phone company | – |
| 605-338 | CenturyLink / Lumen | Local phone company | – |
| 605-339 | CenturyLink / Lumen | Local phone company | – |
| 605-351 | Verizon Wireless | Mobile carrier | – |
| 605-357 | CenturyLink / Lumen | Local phone company | – |
| 605-359 | Verizon Wireless | Mobile carrier | – |
| 605-360 | AT&T Mobility | Mobile carrier | – |
| 605-361 | CenturyLink / Lumen | Local phone company | – |
| 605-362 | CenturyLink / Lumen | Local phone company | – |
| 605-366 | Verizon Wireless | Mobile carrier | – |
| 605-367 | CenturyLink / Lumen | Local phone company | – |
| 605-370 | AT&T Mobility | Mobile carrier | 2001 |
| 605-371 | CenturyLink / Lumen | Local phone company | – |
| 605-373 | CenturyLink / Lumen | Local phone company | – |
| 605-376 | T-Mobile (including Sprint) | Mobile carrier | – |
| 605-400 | AT&T Mobility | Mobile carrier | 2007 |
| 605-401 | IP Horizon | Internet / business phone carrier | 2021 |
| 605-403 | Csc Wireless | Mobile carrier | 2019 |
| 605-404 | CenturyLink / Lumen | Local phone company | 2017 |
| 605-413 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 605-444 | Midcontinent Communications | Phone company | 2006 |
| 605-476 | Wavenation | Phone company | 2025 |
| 605-496 | Onvoy | Internet / business phone carrier | 2008 |
| 605-501 | Wide Voice | Phone company | 2019 |
| 605-504 | CenturyLink / Lumen | Local phone company | 2016 |
| 605-509 | CenturyLink / Lumen | Local phone company | – |
| 605-518 | Comcast | Internet / business phone carrier | 2023 |
| 605-521 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 605-553 | MCImetro (Verizon Business) | Internet / business phone carrier | 2004 |
| 605-575 | CenturyLink / Lumen | Local phone company | – |
| 605-595 | AT&T (local phone) | Local phone company | – |
| 605-601 | Twilio | Internet / business phone carrier | 2020 |
| 605-606 | Onvoy | Internet / business phone carrier | 2019 |
| 605-607 | Hd Carrier | Internet / business phone carrier | 2019 |
| 605-610 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 605-650 | Exiant Communications | Phone company | 2019 |
| 605-679 | CenturyLink / Lumen | Local phone company | 2012 |
| 605-681 | Nuso | Internet / business phone carrier | 2013 |
| 605-705 | Commio | Internet / business phone carrier | 2019 |
| 605-728 | T-Mobile (including Sprint) | Mobile carrier | – |
| 605-731 | CenturyLink / Lumen | Local phone company | – |
| 605-740 | CenturyLink / Lumen | Local phone company | 2017 |
| 605-759 | Verizon Wireless | Mobile carrier | – |
| 605-774 | Edgetel | Phone company | 2020 |
| 605-782 | CenturyLink / Lumen | Local phone company | – |
| 605-789 | AT&T Mobility | Mobile carrier | 2010 |
| 605-790 | AT&T Mobility | Mobile carrier | 2026 |
| 605-799 | Airus | Phone company | 2015 |
| 605-800 | Terra Nova Telecom | Internet / business phone carrier | 2018 |
| 605-809 | Nuso | Internet / business phone carrier | – |
| 605-812 | Boost / Virgin Mobile | Mobile carrier | 2021 |
| 605-838 | Onvoy | Internet / business phone carrier | 2008 |
| 605-900 | Fractel | Internet / business phone carrier | 2019 |
| 605-906 | Teleport Communications America Sd-llc | Internet / business phone carrier | 2012 |
| 605-910 | Onvoy | Internet / business phone carrier | 2021 |
| 605-929 | Verizon Wireless | Mobile carrier | – |
| 605-937 | Bandwidth | Internet / business phone carrier | – |
| 605-940 | AT&T Mobility | Mobile carrier | – |
| 605-941 | AT&T Mobility | Mobile carrier | – |
| 605-951 | Bandwidth | Internet / business phone carrier | 2008 |
| 605-961 | Vonage America | Internet / business phone carrier | 2018 |
| 605-965 | Bluepeak | Phone company | – |
| 605-977 | CenturyLink / Lumen | Local phone company | – |
| 605-978 | CenturyLink / Lumen | Local phone company | – |
| 605-988 | CenturyLink / Lumen | Local phone company | – |
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.