Phone numbers in Randolph, Massachusetts
Randolph has 23 phone prefixes in area codes 339, 781.
Biggest holders: T-Mobile (including Sprint), Verizon (local phone), Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 30%
- Local phone company 22%
- Internet / business phone carrier 39%
- Phone company 9%
Every prefix in Randolph
Search the first six digits of a number in this list. If it's here, the number started in Randolph with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 339-208 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 339-216 | Verizon Wireless | Mobile carrier | 2016 |
| 339-837 | TON80 Communications | Internet / business phone carrier | 2022 |
| 339-987 | Verizon Wireless | Mobile carrier | 2001 |
| 781-300 | MCImetro (Verizon Business) | Internet / business phone carrier | 2001 |
| 781-308 | T-Mobile (including Sprint) | Mobile carrier | – |
| 781-390 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 781-437 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-473 | Verizon (local phone) | Local phone company | – |
| 781-506 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-510 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 781-607 | Tc Systems | Phone company | – |
| 781-767 | Verizon (local phone) | Local phone company | – |
| 781-785 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-805 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 781-807 | Comcast | Internet / business phone carrier | – |
| 781-815 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 781-824 | Rcn Telecom Services | Phone company | – |
| 781-885 | Comcast | Internet / business phone carrier | – |
| 781-888 | T-Mobile (including Sprint) | Mobile carrier | – |
| 781-961 | Verizon (local phone) | Local phone company | – |
| 781-963 | Verizon (local phone) | Local phone company | – |
| 781-986 | Verizon (local phone) | 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.