Phone numbers in Lake Dallas, Texas
Lake Dallas has 11 phone prefixes in area code 940.
Biggest holders: Grande Communications Networks, Brightspeed Of Northern Texas, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 27%
- Local phone company 27%
- Internet / business phone carrier 18%
- Phone company 27%
Every prefix in Lake Dallas
Search the first six digits of a number in this list. If it's here, the number started in Lake Dallas with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 940-269 | Grande Communications Networks | Phone company | – |
| 940-270 | Grande Communications Networks | Phone company | – |
| 940-279 | Charter / Spectrum | Internet / business phone carrier | 2010 |
| 940-321 | Brightspeed Of Northern Texas | Local phone company | – |
| 940-326 | Grande Communications Networks | Phone company | – |
| 940-344 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 940-363 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 940-418 | MetroPCS (T-Mobile) | Mobile carrier | 2026 |
| 940-497 | Brightspeed Of Northern Texas | Local phone company | – |
| 940-498 | Brightspeed Of Northern Texas | Local phone company | – |
| 940-900 | 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.