Phone numbers in Leander, Texas
Leander has 22 phone prefixes in area codes 512, 737.
Biggest holders: Onvoy, T-Mobile (including Sprint), AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 23%
- Local phone company 18%
- Internet / business phone carrier 50%
- Phone company 9%
Every prefix in Leander
Search the first six digits of a number in this list. If it's here, the number started in Leander with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 512-259 | AT&T (local phone) | Local phone company | – |
| 512-260 | AT&T (local phone) | Local phone company | – |
| 512-325 | Onvoy | Internet / business phone carrier | 2023 |
| 512-337 | AT&T Enterprises | Phone company | 2006 |
| 512-379 | AT&T (local phone) | Local phone company | – |
| 512-456 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 512-528 | AT&T (local phone) | Local phone company | – |
| 512-616 | Onvoy | Internet / business phone carrier | – |
| 512-690 | Teleport Communications America | Internet / business phone carrier | – |
| 512-817 | Onvoy | Internet / business phone carrier | 2015 |
| 512-881 | Onvoy | Internet / business phone carrier | 2022 |
| 512-986 | T-Mobile (including Sprint) | Mobile carrier | – |
| 737-287 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 737-298 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 737-323 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 737-324 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 737-379 | Onvoy | Internet / business phone carrier | 2024 |
| 737-432 | Onvoy | Internet / business phone carrier | 2025 |
| 737-757 | Bandwidth | Internet / business phone carrier | 2016 |
| 737-766 | Fractel | Internet / business phone carrier | 2019 |
| 737-777 | Foremost Telecommunications | Phone company | 2013 |
| 737-843 | MCImetro (Verizon Business) | Internet / business phone carrier | 2015 |
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.