Phone numbers in Westfield, Indiana
Westfield has 10 phone prefixes in area codes 317, 463.
Biggest holders: Frontier, Bandwidth, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 40%
- Internet / business phone carrier 60%
Every prefix in Westfield
Search the first six digits of a number in this list. If it's here, the number started in Westfield with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 317-399 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 317-763 | Bandwidth | Internet / business phone carrier | 2014 |
| 317-785 | Bandwidth | Internet / business phone carrier | 2018 |
| 317-804 | Frontier | Local phone company | – |
| 317-867 | Frontier | Local phone company | – |
| 317-877 | Frontier | Local phone company | – |
| 317-896 | Frontier | Local phone company | – |
| 463-243 | Onvoy | Internet / business phone carrier | 2020 |
| 463-323 | Onvoy | Internet / business phone carrier | 2025 |
| 463-622 | 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.