Phone numbers in Essex, Connecticut
Essex has 6 phone prefixes in area codes 860, 959.
Biggest holders: Onvoy, Teleport Communications America, MetroPCS (T-Mobile). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 17%
- Local phone company 17%
- Internet / business phone carrier 67%
Every prefix in Essex
Search the first six digits of a number in this list. If it's here, the number started in Essex with the carrier shown. If it isn't, check the Connecticut page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 860-581 | Teleport Communications America | Internet / business phone carrier | – |
| 860-662 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 860-767 | AT&T (local phone) | Local phone company | – |
| 959-220 | Onvoy | Internet / business phone carrier | 2020 |
| 959-233 | Onvoy | Internet / business phone carrier | 2019 |
| 959-265 | Onvoy | Internet / business phone carrier | 2017 |
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.