Phone numbers in Plainfield, Indiana
Plainfield has 18 phone prefixes in area codes 317, 463.
Biggest holders: AT&T (local phone), Windstream (PAETEC), Teleport Communications America. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 6%
- Local phone company 28%
- Internet / business phone carrier 61%
- Phone company 6%
Every prefix in Plainfield
Search the first six digits of a number in this list. If it's here, the number started in Plainfield with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 317-203 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 317-204 | Teleport Communications America | Internet / business phone carrier | – |
| 317-268 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 317-272 | AT&T (local phone) | Local phone company | – |
| 317-279 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 317-303 | Onvoy | Internet / business phone carrier | 2026 |
| 317-406 | AT&T (local phone) | Local phone company | 2005 |
| 317-561 | Teleport Communications America | Internet / business phone carrier | 2001 |
| 317-707 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 317-742 | AT&T Enterprises | Phone company | 2006 |
| 317-754 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 317-837 | AT&T (local phone) | Local phone company | – |
| 317-838 | AT&T (local phone) | Local phone company | – |
| 317-839 | AT&T (local phone) | Local phone company | – |
| 463-236 | Teleport Communications America | Internet / business phone carrier | 2020 |
| 463-255 | Onvoy | Internet / business phone carrier | 2020 |
| 463-275 | Comcast | Internet / business phone carrier | 2022 |
| 463-297 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
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.