Phone numbers in Brownsburg, Indiana
Brownsburg has 13 phone prefixes in area codes 317, 463.
Biggest holders: Level 3 (Lumen), Comcast, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 15%
- Local phone company 15%
- Internet / business phone carrier 69%
Every prefix in Brownsburg
Search the first six digits of a number in this list. If it's here, the number started in Brownsburg with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 317-286 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 317-350 | Comcast | Internet / business phone carrier | 2011 |
| 317-456 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 317-520 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 317-852 | AT&T (local phone) | Local phone company | – |
| 317-858 | AT&T (local phone) | Local phone company | – |
| 317-939 | Comcast | Internet / business phone carrier | 2014 |
| 463-294 | Onvoy | Internet / business phone carrier | 2024 |
| 463-319 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 463-348 | Fractel | Internet / business phone carrier | 2021 |
| 463-553 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
| 463-583 | TON80 Communications | Internet / business phone carrier | 2021 |
| 463-888 | Onvoy | Internet / business phone carrier | 2017 |
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.