Phone numbers in Humboldt, Tennessee
Humboldt has 13 phone prefixes in area code 731.
Biggest holders: AT&T (local phone), Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 23%
- Internet / business phone carrier 31%
- Phone company 8%
Every prefix in Humboldt
Search the first six digits of a number in this list. If it's here, the number started in Humboldt with the carrier shown. If it isn't, check the Tennessee page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 731-222 | AT&T (local phone) | Local phone company | – |
| 731-273 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 731-294 | Onvoy | Internet / business phone carrier | 2026 |
| 731-337 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 731-388 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 731-414 | Verizon Wireless | Mobile carrier | 2003 |
| 731-420 | AT&T Mobility | Mobile carrier | – |
| 731-487 | Verizon Wireless | Mobile carrier | 2005 |
| 731-562 | Aeneas Communications | Phone company | – |
| 731-618 | AT&T Mobility | Mobile carrier | – |
| 731-747 | Onvoy | Internet / business phone carrier | 2016 |
| 731-784 | AT&T (local phone) | Local phone company | – |
| 731-824 | 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.