Phone numbers in Gilmore City, Iowa
Gilmore City has 3 phone prefixes in area code 515.
Biggest holders: Onvoy, CenturyLink / Lumen, TON80 Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 33%
- Internet / business phone carrier 67%
Every prefix in Gilmore City
Search the first six digits of a number in this list. If it's here, the number started in Gilmore City with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 515-316 | Onvoy | Internet / business phone carrier | 2019 |
| 515-373 | CenturyLink / Lumen | Local phone company | – |
| 515-622 | TON80 Communications | Internet / business phone carrier | 2022 |
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.