Phone numbers in Cedar Hill, Texas
Cedar Hill has 21 phone prefixes in area codes 214, 469, 945, 972.
Biggest holders: Onvoy, Level 3 (Lumen), AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 5%
- Local phone company 24%
- Internet / business phone carrier 71%
Every prefix in Cedar Hill
Search the first six digits of a number in this list. If it's here, the number started in Cedar Hill with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 214-203 | Onvoy | Internet / business phone carrier | – |
| 214-247 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 214-602 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 469-272 | AT&T (local phone) | Local phone company | – |
| 469-382 | Onvoy | Internet / business phone carrier | 2017 |
| 469-454 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 469-523 | Onvoy | Internet / business phone carrier | – |
| 469-526 | Teleport Communications America | Internet / business phone carrier | 2002 |
| 469-575 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 469-736 | Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | – |
| 469-780 | Teleport Communications America | Internet / business phone carrier | 2020 |
| 945-212 | Onvoy | Internet / business phone carrier | 2021 |
| 945-228 | Bandwidth | Internet / business phone carrier | 2021 |
| 945-363 | Onvoy | Internet / business phone carrier | 2025 |
| 972-291 | AT&T (local phone) | Local phone company | – |
| 972-293 | AT&T (local phone) | Local phone company | – |
| 972-299 | AT&T (local phone) | Local phone company | – |
| 972-460 | Onvoy | Internet / business phone carrier | – |
| 972-637 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 972-765 | AT&T Mobility | Mobile carrier | 2003 |
| 972-779 | AT&T (local phone) | Local phone company | – |
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.