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

CATSKILL prefixes in area code 518

NANPA records 7 assigned NXX blocks to rate center CATSKILL in area code 518, 0.9% of the 775 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 NEW CINGULAR WIRELESS PCS, LLC - DC (1), LEVEL 3 COMMUNICATIONS, LLC - NY (1), TC SYSTEMS, INC. - NY (1). The earliest assignment on record here is 2004-03-11 and the most recent 2004-03-11. 7 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 838 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 0.9% of 518
7 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
518-291 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2004-03-11 yes yes
518-303 Lumen LEVEL 3 COMMUNICATIONS, LLC - NY – yes yes
518-625 AT&T TC SYSTEMS, INC. - NY – yes yes
518-719 TVC ALBANY, INC. DBA FIRSTLIGHT FIBER – yes yes
518-819 Lumen LEVEL 3 TELECOM OF NEW YORK, LP - NY – yes yes
518-943 Verizon VERIZON NEW YORK, INC. – yes yes
518-947 Windstream PAETEC ITEL, LLC – 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
NEW CINGULAR WIRELESS PCS, LLC - DC AT&T 1 14.3%
LEVEL 3 COMMUNICATIONS, LLC - NY Lumen 1 14.3%
TC SYSTEMS, INC. - NY AT&T 1 14.3%
TVC ALBANY, INC. DBA FIRSTLIGHT FIBER – 1 14.3%
LEVEL 3 TELECOM OF NEW YORK, LP - NY Lumen 1 14.3%
VERIZON NEW YORK, INC. Verizon 1 14.3%
PAETEC ITEL, LLC Windstream 1 14.3%

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 CATSKILL in area code 518?

7 blocks: 291, 303, 625, 719, 819, 943, 947. The table above gives the holder of each.

Which carriers have numbers in CATSKILL?

NEW CINGULAR WIRELESS PCS, LLC - DC (1 block), LEVEL 3 COMMUNICATIONS, LLC - NY (1 block), TC SYSTEMS, INC. - NY (1 block), TVC ALBANY, INC. DBA FIRSTLIGHT FIBER (1 block), LEVEL 3 TELECOM OF NEW YORK, LP - NY (1 block), VERIZON NEW YORK, 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 CATSKILL 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 518

All 775 prefixes in 518