Phone numbers in Monona, Iowa
Monona has 3 phone prefixes in area code 563.
Biggest holders: AT&T Mobility, T-Mobile (including Sprint), Northeast Iowa Tel. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Phone company 33%
Every prefix in Monona
Search the first six digits of a number in this list. If it's here, the number started in Monona with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 563-330 | AT&T Mobility | Mobile carrier | 2021 |
| 563-537 | T-Mobile (including Sprint) | Mobile carrier | 2006 |
| 563-539 | Northeast Iowa 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.