NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

BROOKLINE prefixes in area code 617

NANPA records 38 assigned NXX blocks to rate center BROOKLINE in area code 617, 4.9% of the 768 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 9 holders hold those blocks, the largest being VERIZON NEW ENGLAND INC. (21), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (4), PAETEC ITEL, LLC (3). The earliest assignment on record here is 2002-07-31 and the most recent 2024-09-25. 19 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 857 – overlay codes cover the same geography, so a rate center is served by all of them.

38 assigned blocks – 4.9% of 617
9 holders of record
19 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
617-232 Verizon VERIZON NEW ENGLAND INC. – no yes
617-264 Verizon VERIZON NEW ENGLAND INC. – yes yes
617-274 Windstream PAETEC ITEL, LLC – yes yes
617-277 Verizon VERIZON NEW ENGLAND INC. – no yes
617-278 Verizon VERIZON NEW ENGLAND INC. – no yes
617-355 Verizon VERIZON NEW ENGLAND INC. – yes yes
617-383 Windstream PAETEC ITEL, LLC – yes yes
617-396 AT&T TC SYSTEMS, INC. – yes yes
617-432 Verizon VERIZON NEW ENGLAND INC. – no yes
617-487 AT&T TC SYSTEMS, INC. – yes yes
617-505 Lumen LEVEL 3 COMMUNICATIONS, LLC - MA – yes yes
617-525 Verizon VERIZON NEW ENGLAND INC. – no yes
617-566 Verizon VERIZON NEW ENGLAND INC. – no yes
617-582 Verizon VERIZON NEW ENGLAND INC. – yes yes
617-608 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
617-632 Verizon VERIZON NEW ENGLAND INC. – no yes
617-651 Windstream PAETEC ITEL, LLC – yes yes
617-667 Verizon VERIZON NEW ENGLAND INC. – no yes
617-677 NORFOLK COUNTY INTERNET, INC. – no yes
617-713 Verizon VERIZON NEW ENGLAND INC. – no yes
617-730 Verizon VERIZON NEW ENGLAND INC. – no yes
617-731 Verizon VERIZON NEW ENGLAND INC. – no yes
617-732 Verizon VERIZON NEW ENGLAND INC. – no yes
617-734 Verizon VERIZON NEW ENGLAND INC. – no yes
617-735 Verizon VERIZON NEW ENGLAND INC. – yes yes
617-738 Verizon VERIZON NEW ENGLAND INC. – no yes
617-739 Verizon VERIZON NEW ENGLAND INC. – no yes
617-751 Lumen LEVEL 3 COMMUNICATIONS, LLC - MA – yes yes
617-754 Verizon VERIZON NEW ENGLAND INC. – no yes
617-857 Bandwidth BANDWIDTH.COM CLEC, LLC - MA 2024-09-25 yes yes
617-860 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
617-879 RCN TELECOM SERVICES, INC. - MA – yes yes
617-906 Lumen LEVEL 3 COMMUNICATIONS, LLC - MA – yes yes
617-935 T-Mobile OMNIPOINT MIAMI E LICENSE, LLC 2002-07-31 yes yes
617-953 T-Mobile OMNIPOINT MIAMI E LICENSE, LLC – no yes
617-975 Verizon VERIZON NEW ENGLAND INC. – no yes
617-991 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
617-992 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
VERIZON NEW ENGLAND INC. Verizon 21 55.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 4 10.5%
PAETEC ITEL, LLC Windstream 3 7.9%
LEVEL 3 COMMUNICATIONS, LLC - MA Lumen 3 7.9%
TC SYSTEMS, INC. AT&T 2 5.3%
OMNIPOINT MIAMI E LICENSE, LLC T-Mobile 2 5.3%
NORFOLK COUNTY INTERNET, INC. – 1 2.6%
BANDWIDTH.COM CLEC, LLC - MA Bandwidth 1 2.6%
RCN TELECOM SERVICES, INC. - MA – 1 2.6%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to BROOKLINE in area code 617?

38 blocks: 232, 264, 274, 277, 278, 355, 383, 396, 432, 487, 505, 525 and 26 more, all listed in the table above.

Which carriers have numbers in BROOKLINE?

VERIZON NEW ENGLAND INC. (21 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (4 blocks), PAETEC ITEL, LLC (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - MA (3 blocks), TC SYSTEMS, INC. (2 blocks), OMNIPOINT MIAMI E LICENSE, LLC (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is BROOKLINE a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 617

All 768 prefixes in 617