Phone numbers in Waltham, Massachusetts
Waltham has 83 phone prefixes in area codes 339, 617, 781.
Biggest holders: Verizon (local phone), AT&T Mobility, MCImetro (Verizon Business). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 23%
- Local phone company 34%
- Internet / business phone carrier 33%
- Phone company 11%
Every prefix in Waltham
Search the first six digits of a number in this list. If it's here, the number started in Waltham with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 339-222 | Verizon Wireless | Mobile carrier | 2001 |
| 339-339 | Mass Mobile | Mobile carrier | 2025 |
| 617-281 | AT&T Mobility | Mobile carrier | – |
| 617-538 | AT&T Mobility | Mobile carrier | – |
| 617-633 | AT&T Mobility | Mobile carrier | – |
| 617-930 | AT&T Mobility | Mobile carrier | – |
| 617-962 | AT&T Mobility | Mobile carrier | – |
| 617-966 | AT&T Mobility | Mobile carrier | – |
| 617-967 | AT&T Mobility | Mobile carrier | – |
| 617-968 | AT&T Mobility | Mobile carrier | – |
| 617-974 | AT&T Mobility | Mobile carrier | – |
| 781-207 | MCImetro (Verizon Business) | Internet / business phone carrier | 2013 |
| 781-208 | Bandwidth | Internet / business phone carrier | – |
| 781-209 | Rcn Telecom Services | Phone company | – |
| 781-212 | Nep | Phone company | 2003 |
| 781-216 | Tc Systems | Phone company | – |
| 781-227 | Verizon Wireless | Mobile carrier | 2017 |
| 781-249 | AT&T Mobility | Mobile carrier | – |
| 781-250 | MCImetro (Verizon Business) | Internet / business phone carrier | 2001 |
| 781-256 | Verizon (local phone) | Local phone company | – |
| 781-290 | Verizon (local phone) | Local phone company | – |
| 781-296 | Verizon Wireless | Mobile carrier | – |
| 781-314 | Verizon (local phone) | Local phone company | – |
| 781-317 | Bandwidth | Internet / business phone carrier | – |
| 781-330 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 781-370 | Tc Systems | Phone company | – |
| 781-373 | Comcast | Internet / business phone carrier | – |
| 781-386 | Verizon (local phone) | Local phone company | – |
| 781-392 | Verizon (local phone) | Local phone company | – |
| 781-398 | Verizon (local phone) | Local phone company | – |
| 781-409 | Verizon (local phone) | Local phone company | – |
| 781-419 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-434 | Tc Systems | Phone company | – |
| 781-464 | Tc Systems | Phone company | – |
| 781-466 | Verizon (local phone) | Local phone company | – |
| 781-472 | Tc Systems | Phone company | – |
| 781-478 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-487 | Verizon (local phone) | Local phone company | – |
| 781-516 | Bandwidth | Internet / business phone carrier | – |
| 781-522 | Verizon (local phone) | Local phone company | – |
| 781-529 | Verizon (local phone) | Local phone company | – |
| 781-530 | Tc Systems | Phone company | – |
| 781-543 | Norfolk County Internet | Phone company | – |
| 781-547 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-577 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-609 | Comcast | Internet / business phone carrier | 2001 |
| 781-614 | Bandwidth | Internet / business phone carrier | – |
| 781-622 | Verizon (local phone) | Local phone company | – |
| 781-642 | Verizon (local phone) | Local phone company | – |
| 781-647 | Verizon (local phone) | Local phone company | – |
| 781-663 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-672 | Verizon (local phone) | Local phone company | – |
| 781-684 | Verizon (local phone) | Local phone company | – |
| 781-693 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-697 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-699 | Verizon (local phone) | Local phone company | 2006 |
| 781-701 | Comcast | Internet / business phone carrier | – |
| 781-703 | Verizon Wireless | Mobile carrier | 2015 |
| 781-736 | Verizon (local phone) | Local phone company | – |
| 781-755 | Verizon Wireless | Mobile carrier | 2018 |
| 781-768 | Verizon (local phone) | Local phone company | – |
| 781-775 | AT&T Mobility | Mobile carrier | – |
| 781-786 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-788 | Verizon (local phone) | Local phone company | – |
| 781-790 | Comcast | Internet / business phone carrier | – |
| 781-795 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-810 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-822 | Fractel | Internet / business phone carrier | 2021 |
| 781-833 | Verizon (local phone) | Local phone company | – |
| 781-839 | Verizon (local phone) | Local phone company | – |
| 781-864 | AT&T Mobility | Mobile carrier | – |
| 781-890 | Verizon (local phone) | Local phone company | – |
| 781-891 | Verizon (local phone) | Local phone company | – |
| 781-893 | Verizon (local phone) | Local phone company | – |
| 781-894 | Verizon (local phone) | Local phone company | – |
| 781-895 | Verizon (local phone) | Local phone company | – |
| 781-899 | Verizon (local phone) | Local phone company | – |
| 781-902 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-906 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-907 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 781-916 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-966 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 781-996 | Level 3 (Lumen) | 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.