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

BILLERICA prefixes in area code 508

NANPA records 3 assigned NXX blocks to rate center BILLERICA in area code 508, 0.4% 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. 1 holder holds those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - DC (3). The same rate center name also appears in area code 978 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 508
1 holders of record
0 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
508-423 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – no yes
508-572 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – no yes
508-574 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – no 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.

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 BILLERICA in area code 508?

3 blocks: 423, 572, 574. The table above gives the holder of each.

Which carriers have numbers in BILLERICA?

NEW CINGULAR WIRELESS PCS, LLC - DC (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is BILLERICA 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