ISLIP prefixes in area code 631
NANPA records 11 assigned NXX blocks to rate center ISLIP in area code 631, 1.4% 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), CABLEVISION LIGHTPATH, INC. - NY (2), PAETEC ITEL, LLC (1). The earliest assignment on record here is 2007-06-07 and the most recent 2018-06-14. 8 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.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 631-210 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 631-224 | Verizon VERIZON NEW YORK, INC. | – | no | yes |
| 631-277 | Verizon VERIZON NEW YORK, INC. | – | no | yes |
| 631-313 | Altice CABLEVISION LIGHTPATH, INC. - NY | 2018-06-14 | yes | yes |
| 631-446 | CSC VOICE, LLC | 2007-06-07 | yes | yes |
| 631-481 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | – | yes | yes |
| 631-581 | Verizon VERIZON NEW YORK, INC. | – | no | yes |
| 631-650 | Altice CABLEVISION LIGHTPATH, INC. - NY | – | yes | yes |
| 631-840 | Lumen LEVEL 3 COMMUNICATIONS, LLC - NY | – | yes | yes |
| 631-859 | Verizon VERIZON NEW YORK, INC. | – | yes | yes |
| 631-960 | AT&T TC SYSTEMS, INC. - NY | – | 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
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| VERIZON NEW YORK, INC. | Verizon | 4 | 36.4% |
| CABLEVISION LIGHTPATH, INC. - NY | Altice | 2 | 18.2% |
| PAETEC ITEL, LLC | Windstream | 1 | 9.1% |
| CSC VOICE, LLC | – | 1 | 9.1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | Verizon | 1 | 9.1% |
| LEVEL 3 COMMUNICATIONS, LLC - NY | Lumen | 1 | 9.1% |
| TC SYSTEMS, INC. - NY | AT&T | 1 | 9.1% |
Frequently asked
Which prefixes belong to ISLIP in area code 631?
11 blocks: 210, 224, 277, 313, 446, 481, 581, 650, 840, 859, 960. The table above gives the holder of each.
Which carriers have numbers in ISLIP?
VERIZON NEW YORK, INC. (4 blocks), CABLEVISION LIGHTPATH, INC. - NY (2 blocks), PAETEC ITEL, LLC (1 block), CSC VOICE, LLC (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY (1 block), LEVEL 3 COMMUNICATIONS, LLC - NY (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is ISLIP 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.