Phone numbers in Washington, Indiana
Washington has 10 phone prefixes in area codes 812, 930.
Biggest holders: AT&T (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 20%
- Internet / business phone carrier 30%
Every prefix in Washington
Search the first six digits of a number in this list. If it's here, the number started in Washington with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 812-254 | AT&T (local phone) | Local phone company | – |
| 812-257 | AT&T (local phone) | Local phone company | – |
| 812-259 | AT&T Mobility | Mobile carrier | – |
| 812-610 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 812-617 | AT&T Mobility | Mobile carrier | 2002 |
| 812-642 | Windstream (PAETEC) | Internet / business phone carrier | 2003 |
| 812-674 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 812-698 | Verizon Wireless | Mobile carrier | 2002 |
| 930-283 | Verizon Wireless | Mobile carrier | 2024 |
| 930-466 | 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.