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

ROCKPORT prefixes in area code 978

NANPA records 4 assigned NXX blocks to rate center ROCKPORT in area code 978, 0.5% 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. 4 holders hold those blocks, the largest being PAETEC ITEL, LLC (1), VERIZON NEW ENGLAND INC. (1), ONVOY, LLC - MA (1). The earliest assignment on record here is 2003-12-08 and the most recent 2016-01-04. 4 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 217, 304, 351, 361 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 978
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
978-309 Windstream PAETEC ITEL, LLC 2003-12-08 yes yes
978-546 Verizon VERIZON NEW ENGLAND INC. – yes yes
978-797 Onvoy ONVOY, LLC - MA 2016-01-04 yes yes
978-999 Peerless PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 2012-11-19 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
PAETEC ITEL, LLC Windstream 1 25%
VERIZON NEW ENGLAND INC. Verizon 1 25%
ONVOY, LLC - MA Onvoy 1 25%
PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA Peerless 1 25%

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 ROCKPORT in area code 978?

4 blocks: 309, 546, 797, 999. The table above gives the holder of each.

Which carriers have numbers in ROCKPORT?

PAETEC ITEL, LLC (1 block), VERIZON NEW ENGLAND INC. (1 block), ONVOY, LLC - MA (1 block), PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ROCKPORT 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