Phone numbers in Charlestown, Indiana
Charlestown has 10 phone prefixes in area codes 812, 930.
Biggest holders: AT&T Mobility, AT&T (local phone), AT&T Enterprises. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 10%
- Internet / business phone carrier 60%
- Phone company 10%
Every prefix in Charlestown
Search the first six digits of a number in this list. If it's here, the number started in Charlestown with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 812-256 | AT&T (local phone) | Local phone company | – |
| 812-406 | AT&T Mobility | Mobile carrier | 2004 |
| 812-503 | AT&T Enterprises | Phone company | 2001 |
| 812-796 | Charter / Spectrum | Internet / business phone carrier | 2002 |
| 812-800 | Windstream (PAETEC) | Internet / business phone carrier | 2010 |
| 930-201 | Onvoy | Internet / business phone carrier | 2017 |
| 930-202 | Teleport Communications America | Internet / business phone carrier | 2017 |
| 930-216 | AT&T Mobility | Mobile carrier | 2020 |
| 930-500 | Fractel | Internet / business phone carrier | 2019 |
| 930-888 | Terra Nova Telecom | Internet / business phone carrier | 2019 |
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.