Phone numbers in Cascade, Iowa
Cascade has 3 phone prefixes in area code 563.
Biggest holders: Level 3 (Lumen), T-Mobile (including Sprint), Cascade Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Internet / business phone carrier 33%
- Phone company 33%
Every prefix in Cascade
Search the first six digits of a number in this list. If it's here, the number started in Cascade with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 563-269 | Level 3 (Lumen) | Internet / business phone carrier | 2018 |
| 563-772 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
| 563-852 | Cascade Communications | 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.