Phone numbers in Brookline, Massachusetts
Brookline has 65 phone prefixes in area codes 617, 857.
Biggest holders: Verizon (local phone), T-Mobile (including Sprint), Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 31%
- Local phone company 37%
- Internet / business phone carrier 25%
- Phone company 8%
Every prefix in Brookline
Search the first six digits of a number in this list. If it's here, the number started in Brookline with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 617-232 | Verizon (local phone) | Local phone company | – |
| 617-264 | Verizon (local phone) | Local phone company | – |
| 617-274 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 617-277 | Verizon (local phone) | Local phone company | – |
| 617-278 | Verizon (local phone) | Local phone company | – |
| 617-355 | Verizon (local phone) | Local phone company | – |
| 617-383 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 617-396 | Tc Systems | Phone company | – |
| 617-432 | Verizon (local phone) | Local phone company | – |
| 617-487 | Tc Systems | Phone company | – |
| 617-505 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 617-525 | Verizon (local phone) | Local phone company | – |
| 617-566 | Verizon (local phone) | Local phone company | – |
| 617-582 | Verizon (local phone) | Local phone company | – |
| 617-608 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 617-632 | Verizon (local phone) | Local phone company | – |
| 617-651 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 617-667 | Verizon (local phone) | Local phone company | – |
| 617-677 | Norfolk County Internet | Phone company | – |
| 617-713 | Verizon (local phone) | Local phone company | – |
| 617-730 | Verizon (local phone) | Local phone company | – |
| 617-731 | Verizon (local phone) | Local phone company | – |
| 617-732 | Verizon (local phone) | Local phone company | – |
| 617-734 | Verizon (local phone) | Local phone company | – |
| 617-735 | Verizon (local phone) | Local phone company | – |
| 617-738 | Verizon (local phone) | Local phone company | – |
| 617-739 | Verizon (local phone) | Local phone company | – |
| 617-751 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 617-754 | Verizon (local phone) | Local phone company | – |
| 617-857 | Bandwidth | Internet / business phone carrier | 2024 |
| 617-860 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 617-879 | Rcn Telecom Services | Phone company | – |
| 617-906 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 617-935 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 617-953 | T-Mobile (including Sprint) | Mobile carrier | – |
| 617-975 | Verizon (local phone) | Local phone company | – |
| 617-991 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 617-992 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 857-215 | Verizon (local phone) | Local phone company | 2010 |
| 857-218 | Verizon (local phone) | Local phone company | 2007 |
| 857-225 | Verizon Wireless | Mobile carrier | 2001 |
| 857-234 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 857-245 | Ymax Communications | Phone company | 2006 |
| 857-307 | Verizon (local phone) | Local phone company | 2006 |
| 857-337 | Verizon Wireless | Mobile carrier | 2015 |
| 857-340 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 857-352 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 857-361 | T-Mobile (including Sprint) | Mobile carrier | – |
| 857-364 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 857-370 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 857-376 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 857-381 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 857-390 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 857-396 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 857-405 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 857-421 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 857-423 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 857-426 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 857-432 | T-Mobile (including Sprint) | Mobile carrier | – |
| 857-565 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 857-576 | Bandwidth | Internet / business phone carrier | – |
| 857-666 | Onvoy | Internet / business phone carrier | 2015 |
| 857-707 | Verizon Wireless | Mobile carrier | 2014 |
| 857-746 | TON80 Communications | Internet / business phone carrier | 2022 |
| 857-867 | Onvoy | Internet / business phone carrier | 2021 |
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.