Phone numbers in Monticello, Arkansas
Monticello has 7 phone prefixes in area code 870.
Biggest holders: Level 3 (Lumen), Verizon Wireless, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 43%
- Local phone company 29%
- Internet / business phone carrier 29%
Every prefix in Monticello
Search the first six digits of a number in this list. If it's here, the number started in Monticello with the carrier shown. If it isn't, check the Arkansas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 870-224 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 870-308 | Verizon Wireless | Mobile carrier | – |
| 870-367 | AT&T (local phone) | Local phone company | – |
| 870-412 | Level 3 (Lumen) | Internet / business phone carrier | 2012 |
| 870-443 | Verizon Wireless | Mobile carrier | – |
| 870-460 | AT&T (local phone) | Local phone company | – |
| 870-723 | AT&T Mobility | Mobile carrier | 2002 |
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.