Phone numbers in El Dorado, Arkansas
El Dorado has 24 phone prefixes in area code 870.
Biggest holders: AT&T (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 54%
- Local phone company 25%
- Internet / business phone carrier 21%
Every prefix in El Dorado
Search the first six digits of a number in this list. If it's here, the number started in El Dorado with the carrier shown. If it isn't, check the Arkansas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 870-288 | Nuso | Internet / business phone carrier | 2023 |
| 870-309 | AT&T (local phone) | Local phone company | – |
| 870-310 | Verizon Wireless | Mobile carrier | – |
| 870-312 | Verizon Wireless | Mobile carrier | – |
| 870-314 | Verizon Wireless | Mobile carrier | – |
| 870-315 | Verizon Wireless | Mobile carrier | – |
| 870-440 | T-Mobile (including Sprint) | Mobile carrier | 2003 |
| 870-444 | Csc Voice | Internet / business phone carrier | 2013 |
| 870-452 | Comcast | Internet / business phone carrier | 2023 |
| 870-618 | AT&T Mobility | Mobile carrier | 2020 |
| 870-639 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 870-665 | T-Mobile (including Sprint) | Mobile carrier | – |
| 870-677 | AT&T Mobility | Mobile carrier | 2003 |
| 870-713 | Csc Wireless | Mobile carrier | 2019 |
| 870-789 | AT&T Mobility | Mobile carrier | 2020 |
| 870-814 | AT&T Mobility | Mobile carrier | – |
| 870-862 | AT&T (local phone) | Local phone company | – |
| 870-863 | AT&T (local phone) | Local phone company | – |
| 870-864 | AT&T (local phone) | Local phone company | – |
| 870-865 | Onvoy | Internet / business phone carrier | 2022 |
| 870-866 | AT&T Mobility | Mobile carrier | – |
| 870-875 | AT&T (local phone) | Local phone company | – |
| 870-881 | AT&T (local phone) | Local phone company | – |
| 870-918 | AT&T Mobility | Mobile carrier | – |
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.