Phone numbers in Alto, Texas
Alto has 3 phone prefixes in area code 936.
Biggest holders: Consolidated Communications Of Texas, Fractel. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 67%
- Internet / business phone carrier 33%
Every prefix in Alto
Search the first six digits of a number in this list. If it's here, the number started in Alto with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 936-858 | Consolidated Communications Of Texas | Local phone company | – |
| 936-877 | Fractel | Internet / business phone carrier | 2020 |
| 936-879 | Consolidated Communications Of Texas | 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.