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

NORTHBORO prefixes in area code 508

NANPA records 9 assigned NXX blocks to rate center NORTHBORO in area code 508, 1.2% of the 749 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. 7 holders hold those blocks, the largest being VERIZON NEW ENGLAND INC. (2), LEVEL 3 COMMUNICATIONS, LLC - MA (2), BANDWIDTH.COM CLEC, LLC - MA (1). The earliest assignment on record here is 2021-11-09 and the most recent 2021-11-09. 8 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 codes 712, 774 – overlay codes cover the same geography, so a rate center is served by all of them.

9 assigned blocks – 1.2% of 508
7 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
508-290 Bandwidth BANDWIDTH.COM CLEC, LLC - MA 2021-11-09 yes yes
508-351 Verizon VERIZON NEW ENGLAND INC. – yes yes
508-393 Verizon VERIZON NEW ENGLAND INC. – no yes
508-466 Onvoy ONVOY, LLC - MA – yes yes
508-571 AT&T TC SYSTEMS, INC. – yes yes
508-691 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
508-709 Lumen LEVEL 3 COMMUNICATIONS, LLC - MA – yes yes
508-919 Windstream PAETEC ITEL, LLC – yes yes
508-936 Lumen LEVEL 3 COMMUNICATIONS, LLC - MA – 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 2 22.2%
LEVEL 3 COMMUNICATIONS, LLC - MA Lumen 2 22.2%
BANDWIDTH.COM CLEC, LLC - MA Bandwidth 1 11.1%
ONVOY, LLC - MA Onvoy 1 11.1%
TC SYSTEMS, INC. AT&T 1 11.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 11.1%
PAETEC ITEL, LLC Windstream 1 11.1%

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 NORTHBORO in area code 508?

9 blocks: 290, 351, 393, 466, 571, 691, 709, 919, 936. The table above gives the holder of each.

Which carriers have numbers in NORTHBORO?

VERIZON NEW ENGLAND INC. (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - MA (2 blocks), BANDWIDTH.COM CLEC, LLC - MA (1 block), ONVOY, LLC - MA (1 block), TC SYSTEMS, INC. (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is NORTHBORO 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 508

All 749 prefixes in 508