Phone numbers in Madison, Florida
Madison has 10 phone prefixes in area codes 448, 850.
Biggest holders: CenturyLink / Lumen, Telnyx, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 30%
- Local phone company 30%
- Internet / business phone carrier 40%
Every prefix in Madison
Search the first six digits of a number in this list. If it's here, the number started in Madison with the carrier shown. If it isn't, check the Florida page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 448-203 | Telnyx | Internet / business phone carrier | 2021 |
| 448-236 | Onvoy | Internet / business phone carrier | 2024 |
| 850-253 | CenturyLink / Lumen | Local phone company | – |
| 850-290 | CenturyLink / Lumen | Local phone company | 2001 |
| 850-464 | AT&T Mobility | Mobile carrier | 2002 |
| 850-601 | Teleport Communications America | Internet / business phone carrier | 2009 |
| 850-673 | T-Mobile (including Sprint) | Mobile carrier | – |
| 850-846 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 850-869 | Verizon Wireless | Mobile carrier | 2003 |
| 850-973 | CenturyLink / Lumen | 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.