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

AMESBURY prefixes in area code 978

NANPA records 6 assigned NXX blocks to rate center AMESBURY in area code 978, 0.8% of the 773 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. 5 holders hold those blocks, the largest being VERIZON NEW ENGLAND INC. (2), LEVEL 3 COMMUNICATIONS, LLC - MA (1), OMNIPOINT MIAMI E LICENSE, LLC (1). The earliest assignment on record here is 2001-01-09 and the most recent 2001-01-09. 5 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 351 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 0.8% of 978
5 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
978-378 Lumen LEVEL 3 COMMUNICATIONS, LLC - MA – yes yes
978-388 Verizon VERIZON NEW ENGLAND INC. – no yes
978-504 T-Mobile OMNIPOINT MIAMI E LICENSE, LLC – yes yes
978-517 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2001-01-09 yes yes
978-792 AT&T TC SYSTEMS, INC. – yes yes
978-834 Verizon VERIZON NEW ENGLAND INC. – 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 33.3%
LEVEL 3 COMMUNICATIONS, LLC - MA Lumen 1 16.7%
OMNIPOINT MIAMI E LICENSE, LLC T-Mobile 1 16.7%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 16.7%
TC SYSTEMS, INC. AT&T 1 16.7%

Frequently asked

Which prefixes belong to AMESBURY in area code 978?

6 blocks: 378, 388, 504, 517, 792, 834. The table above gives the holder of each.

Which carriers have numbers in AMESBURY?

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

Is AMESBURY 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 978

All 773 prefixes in 978