Phone numbers in Petersburg, Indiana
Petersburg has 9 phone prefixes in area code 812.
Biggest holders: Frontier, Level 3 (Lumen), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 22%
- Local phone company 33%
- Internet / business phone carrier 44%
Every prefix in Petersburg
Search the first six digits of a number in this list. If it's here, the number started in Petersburg with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 812-354 | Frontier | Local phone company | – |
| 812-380 | Frontier | Local phone company | – |
| 812-407 | Onvoy | Internet / business phone carrier | 2001 |
| 812-441 | Twilio | Internet / business phone carrier | – |
| 812-582 | Verizon Wireless | Mobile carrier | 2001 |
| 812-601 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 812-766 | AT&T Mobility | Mobile carrier | 2002 |
| 812-789 | Frontier | Local phone company | – |
| 812-809 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
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.