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

HAMPTNBAYS prefixes in area code 631

NANPA records 7 assigned NXX blocks to rate center HAMPTNBAYS in area code 631, 0.9% of the 782 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 CSC VOICE, LLC (2), VERIZON NEW YORK, INC. (2), METROPCS, INC. (1). The earliest assignment on record here is 2001-03-15 and the most recent 2002-10-21. 6 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 934 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 0.9% of 631
5 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
631-276 T-Mobile METROPCS, INC. 2002-10-21 yes yes
631-594 CSC VOICE, LLC 2001-03-15 yes yes
631-685 Onvoy ONVOY, LLC- NY – yes yes
631-723 Verizon VERIZON NEW YORK, INC. – yes yes
631-728 Verizon VERIZON NEW YORK, INC. – no yes
631-856 CSC VOICE, LLC – yes yes
631-887 Windstream PAETEC ITEL, LLC 2001-10-10 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
CSC VOICE, LLC – 2 28.6%
VERIZON NEW YORK, INC. Verizon 2 28.6%
METROPCS, INC. T-Mobile 1 14.3%
ONVOY, LLC- NY Onvoy 1 14.3%
PAETEC ITEL, LLC Windstream 1 14.3%

Frequently asked

Which prefixes belong to HAMPTNBAYS in area code 631?

7 blocks: 276, 594, 685, 723, 728, 856, 887. The table above gives the holder of each.

Which carriers have numbers in HAMPTNBAYS?

CSC VOICE, LLC (2 blocks), VERIZON NEW YORK, INC. (2 blocks), METROPCS, INC. (1 block), ONVOY, LLC- NY (1 block), PAETEC ITEL, 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 HAMPTNBAYS 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 631

All 782 prefixes in 631