Phone numbers in Harlan, Iowa
Harlan has 8 phone prefixes in area code 712.
Biggest holders: Farmers Mutual Cooperative Telephone, Windstream Iowa Communications, Inc. - Systems, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 12%
- Local phone company 50%
- Internet / business phone carrier 12%
- Phone company 25%
Every prefix in Harlan
Search the first six digits of a number in this list. If it's here, the number started in Harlan with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-235 | Farmers Mutual Cooperative Telephone | Local phone company | 2001 |
| 712-236 | Farmers Mutual Cooperative Telephone | Local phone company | 2001 |
| 712-280 | Windstream Iowa Communications, Inc. - Systems | Local phone company | 2018 |
| 712-404 | AT&T Mobility | Mobile carrier | 2005 |
| 712-572 | Onvoy | Internet / business phone carrier | 2021 |
| 712-733 | Aureon Communications | Phone company | 2001 |
| 712-744 | Farmers Mutual Coop. Tel | Phone company | – |
| 712-755 | Windstream Iowa Communications, Inc. - Systems | 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.