Phone numbers in Shamrock, Texas
Shamrock has 4 phone prefixes in area code 806.
Biggest holders: Verizon Wireless, AT&T (local phone), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 25%
- Internet / business phone carrier 25%
Every prefix in Shamrock
Search the first six digits of a number in this list. If it's here, the number started in Shamrock with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 806-216 | Verizon Wireless | Mobile carrier | 2002 |
| 806-256 | AT&T (local phone) | Local phone company | – |
| 806-334 | AT&T Mobility | Mobile carrier | 2002 |
| 806-816 | Teleport Communications America | Internet / business phone carrier | 2023 |
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.