Phone numbers in Hermiston, Oregon
Hermiston has 17 phone prefixes in area codes 458, 541.
Biggest holders: UScellular, T-Mobile (including Sprint), CenturyLink / Lumen. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 47%
- Local phone company 18%
- Internet / business phone carrier 24%
- Phone company 12%
Every prefix in Hermiston
Search the first six digits of a number in this list. If it's here, the number started in Hermiston with the carrier shown. If it isn't, check the Oregon page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 458-219 | UScellular | Mobile carrier | 2016 |
| 458-255 | UScellular | Mobile carrier | 2020 |
| 458-300 | Invoxio Incorporated | Phone company | 2018 |
| 458-318 | Commio | Internet / business phone carrier | 2024 |
| 458-352 | Onvoy | Internet / business phone carrier | 2026 |
| 541-289 | Eastern Oregon Telecom | Phone company | 2001 |
| 541-303 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 541-314 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 541-371 | Verizon Wireless | Mobile carrier | 2014 |
| 541-561 | Verizon Wireless | Mobile carrier | – |
| 541-564 | CenturyLink / Lumen | Local phone company | – |
| 541-567 | CenturyLink / Lumen | Local phone company | – |
| 541-571 | UScellular | Mobile carrier | – |
| 541-656 | T-Mobile (including Sprint) | Mobile carrier | 2009 |
| 541-667 | CenturyLink / Lumen | Local phone company | – |
| 541-701 | Charter / Spectrum | Internet / business phone carrier | 2007 |
| 541-720 | T-Mobile (including Sprint) | Mobile carrier | – |
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.