Phone numbers in Dedham, Massachusetts
Dedham has 41 phone prefixes in area codes 339, 617, 781.
Biggest holders: Verizon (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 34%
- Local phone company 24%
- Internet / business phone carrier 34%
- Phone company 7%
Every prefix in Dedham
Search the first six digits of a number in this list. If it's here, the number started in Dedham with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 339-204 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 339-213 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 617-365 | AT&T Mobility | Mobile carrier | – |
| 617-462 | AT&T Mobility | Mobile carrier | – |
| 617-640 | AT&T Mobility | Mobile carrier | – |
| 617-759 | AT&T Mobility | Mobile carrier | – |
| 781-223 | Verizon Wireless | Mobile carrier | 2001 |
| 781-234 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-251 | Verizon (local phone) | Local phone company | – |
| 781-310 | Verizon (local phone) | Local phone company | 2013 |
| 781-320 | Verizon (local phone) | Local phone company | – |
| 781-326 | Verizon (local phone) | Local phone company | – |
| 781-329 | Verizon (local phone) | Local phone company | – |
| 781-355 | Onvoy | Internet / business phone carrier | – |
| 781-366 | AT&T Mobility | Mobile carrier | – |
| 781-375 | Tc Systems | Phone company | – |
| 781-379 | Verizon Wireless | Mobile carrier | 2017 |
| 781-381 | Rcn Telecom Services | Phone company | – |
| 781-403 | Verizon Wireless | Mobile carrier | 2017 |
| 781-407 | Verizon (local phone) | Local phone company | – |
| 781-410 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-441 | Verizon (local phone) | Local phone company | – |
| 781-459 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-461 | Verizon (local phone) | Local phone company | – |
| 781-467 | Verizon (local phone) | Local phone company | – |
| 781-468 | Verizon Wireless | Mobile carrier | 2017 |
| 781-471 | Tc Systems | Phone company | – |
| 781-492 | T-Mobile (including Sprint) | Mobile carrier | – |
| 781-493 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-613 | Bandwidth | Internet / business phone carrier | – |
| 781-636 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-686 | Comcast | Internet / business phone carrier | – |
| 781-690 | AT&T Mobility | Mobile carrier | – |
| 781-708 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-742 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-747 | Verizon Wireless | Mobile carrier | 2018 |
| 781-751 | Verizon (local phone) | Local phone company | – |
| 781-752 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-801 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 781-809 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 781-915 | MCImetro (Verizon Business) | Internet / business phone 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.