Phone numbers in New Haven, Iowa
New Haven has 17 phone prefixes in area code 641.
Biggest holders: Farmers Tel. This is the local calling area (rate center) where those prefixes were first assigned.
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Every prefix in New Haven
Search the first six digits of a number in this list. If it's here, the number started in New Haven with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 641-213 | Farmers Tel | Phone company | 2006 |
| 641-235 | Farmers Tel | Phone company | 2006 |
| 641-237 | Farmers Tel | Phone company | 2006 |
| 641-262 | Farmers Tel | Phone company | 2006 |
| 641-308 | Farmers Tel | Phone company | 2006 |
| 641-309 | Farmers Tel | Phone company | 2006 |
| 641-410 | Farmers Tel | Phone company | 2006 |
| 641-453 | Farmers Tel | Phone company | 2006 |
| 641-509 | Farmers Tel | Phone company | 2006 |
| 641-551 | Farmers Tel | Phone company | 2006 |
| 641-612 | Farmers Tel | Phone company | 2006 |
| 641-665 | Farmers Tel | Phone company | 2006 |
| 641-739 | Farmers Tel | Phone company | 2006 |
| 641-827 | Farmers Tel | Phone company | 2005 |
| 641-865 | Farmers Tel | Phone company | 2006 |
| 641-962 | Farmers Tel | Phone company | 2006 |
| 641-982 | Farmers Tel | 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.