Phone numbers in Rockdale, Texas
Rockdale has 11 phone prefixes in area codes 512, 737.
Biggest holders: MetroPCS (T-Mobile), AT&T (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 45%
- Local phone company 18%
- Internet / business phone carrier 36%
Every prefix in Rockdale
Search the first six digits of a number in this list. If it's here, the number started in Rockdale with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 512-290 | MetroPCS (T-Mobile) | Mobile carrier | 2006 |
| 512-429 | Verizon Wireless | Mobile carrier | – |
| 512-430 | AT&T (local phone) | Local phone company | – |
| 512-446 | AT&T (local phone) | Local phone company | – |
| 512-543 | Onvoy | Internet / business phone carrier | – |
| 512-760 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 737-225 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 737-369 | Commio | Internet / business phone carrier | 2023 |
| 737-375 | Onvoy | Internet / business phone carrier | 2021 |
| 737-421 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
| 737-732 | Fractel | Internet / business phone carrier | 2020 |
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.