Phone numbers in Rapid City, South Dakota
Rapid City has 50 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 40%
- Local phone company 34%
- Internet / business phone carrier 14%
- Phone company 12%
Every prefix in Rapid City
Search the first six digits of a number in this list. If it's here, the number started in Rapid City with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-209 | AT&T Mobility | Mobile carrier | – |
| 605-219 | Verizon Wireless | Mobile carrier | 2014 |
| 605-341 | CenturyLink / Lumen | Local phone company | – |
| 605-342 | CenturyLink / Lumen | Local phone company | – |
| 605-343 | CenturyLink / Lumen | Local phone company | – |
| 605-348 | CenturyLink / Lumen | Local phone company | – |
| 605-355 | CenturyLink / Lumen | Local phone company | – |
| 605-381 | AT&T Mobility | Mobile carrier | – |
| 605-385 | CenturyLink / Lumen | Local phone company | – |
| 605-388 | CenturyLink / Lumen | Local phone company | – |
| 605-389 | AT&T Mobility | Mobile carrier | – |
| 605-390 | Verizon Wireless | Mobile carrier | – |
| 605-391 | AT&T Mobility | Mobile carrier | – |
| 605-393 | CenturyLink / Lumen | Local phone company | – |
| 605-394 | CenturyLink / Lumen | Local phone company | – |
| 605-399 | CenturyLink / Lumen | Local phone company | – |
| 605-415 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 605-416 | Verizon Wireless | Mobile carrier | 2021 |
| 605-430 | Verizon Wireless | Mobile carrier | – |
| 605-431 | Verizon Wireless | Mobile carrier | – |
| 605-484 | Verizon Wireless | Mobile carrier | – |
| 605-503 | Boost / Virgin Mobile | Mobile carrier | 2021 |
| 605-508 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
| 605-510 | AT&T Mobility | Mobile carrier | 2021 |
| 605-513 | Nuso | Internet / business phone carrier | 2023 |
| 605-519 | Verizon Wireless | Mobile carrier | 2012 |
| 605-545 | AT&T Mobility | Mobile carrier | 2001 |
| 605-593 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 605-600 | Fractel | Internet / business phone carrier | 2019 |
| 605-603 | Bandwidth | Internet / business phone carrier | 2026 |
| 605-608 | Hd Carrier | Internet / business phone carrier | 2019 |
| 605-646 | Bandwidth | Internet / business phone carrier | 2011 |
| 605-716 | Bluepeak | Phone company | 2001 |
| 605-718 | Bluepeak | Phone company | 2001 |
| 605-719 | Bluepeak | Phone company | – |
| 605-721 | Bluepeak | Phone company | – |
| 605-727 | CenturyLink / Lumen | Local phone company | – |
| 605-737 | CenturyLink / Lumen | Local phone company | – |
| 605-755 | Bluepeak | Phone company | 2011 |
| 605-786 | CenturyLink / Lumen | Local phone company | – |
| 605-787 | CenturyLink / Lumen | Local phone company | – |
| 605-791 | Midcontinent Communications | Phone company | 2006 |
| 605-858 | AT&T Mobility | Mobile carrier | 2010 |
| 605-863 | AT&T Mobility | Mobile carrier | 2003 |
| 605-872 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 605-877 | CenturyLink / Lumen | Local phone company | – |
| 605-923 | CenturyLink / Lumen | Local phone company | – |
| 605-939 | AT&T (local phone) | Local phone company | – |
| 605-974 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
| 605-981 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
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.