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

SOUTHAMPTN prefixes in area code 631

NANPA records 12 assigned NXX blocks to rate center SOUTHAMPTN in area code 631, 1.5% 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. 7 holders hold those blocks, the largest being VERIZON NEW YORK, INC. (4), NEW CINGULAR WIRELESS PCS, LLC - DC (2), ONVOY, LLC- NY (2). The earliest assignment on record here is 2002-10-09 and the most recent 2013-04-04. 9 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.

12 assigned blocks – 1.5% of 631
7 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
631-204 Verizon VERIZON NEW YORK, INC. – yes yes
631-259 Verizon VERIZON NEW YORK, INC. – yes yes
631-268 Peerless PEERLESS NETWORK OF NEW YORK, LLC - NY 2013-04-04 yes yes
631-283 Verizon VERIZON NEW YORK, INC. – no yes
631-287 Verizon VERIZON NEW YORK, INC. – no yes
631-353 Bandwidth BANDWIDTH.COM CLEC, LLC - NY 2010-08-26 yes yes
631-377 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2006-11-21 yes yes
631-488 CSC VOICE, LLC 2007-08-21 yes yes
631-614 Onvoy ONVOY, LLC- NY – no yes
631-702 Lumen LEVEL 3 COMMUNICATIONS, LLC - NY – yes yes
631-800 Onvoy ONVOY, LLC- NY – yes yes
631-903 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2002-10-09 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 YORK, INC. Verizon 4 33.3%
NEW CINGULAR WIRELESS PCS, LLC - DC AT&T 2 16.7%
ONVOY, LLC- NY Onvoy 2 16.7%
PEERLESS NETWORK OF NEW YORK, LLC - NY Peerless 1 8.3%
BANDWIDTH.COM CLEC, LLC - NY Bandwidth 1 8.3%
CSC VOICE, LLC – 1 8.3%
LEVEL 3 COMMUNICATIONS, LLC - NY Lumen 1 8.3%

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 SOUTHAMPTN in area code 631?

12 blocks: 204, 259, 268, 283, 287, 353, 377, 488, 614, 702, 800, 903. The table above gives the holder of each.

Which carriers have numbers in SOUTHAMPTN?

VERIZON NEW YORK, INC. (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (2 blocks), ONVOY, LLC- NY (2 blocks), PEERLESS NETWORK OF NEW YORK, LLC - NY (1 block), BANDWIDTH.COM CLEC, LLC - NY (1 block), CSC VOICE, 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 SOUTHAMPTN 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