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

CLAIRTON prefixes in area code 412

NANPA records 8 assigned NXX blocks to rate center CLAIRTON in area code 412, 1.0% of the 762 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. 6 holders hold those blocks, the largest being ONVOY, LLC - PA (2), BANDWIDTH.COM CLEC, LLC - PA (2), TELEPORT COMMUNICATIONS AMERICA, LLC - PA (1). The earliest assignment on record here is 2006-12-13 and the most recent 2019-05-01. 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 878 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1% of 412
6 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
412-226 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - PA – yes yes
412-233 Verizon VERIZON PENNSYLVANIA, INC. – no yes
412-274 Onvoy ONVOY, LLC - PA 2016-03-16 yes yes
412-468 YMAX COMMUNICATIONS CORP. - PA 2006-12-13 yes yes
412-533 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
412-547 Bandwidth BANDWIDTH.COM CLEC, LLC - PA 2019-05-01 yes yes
412-743 Onvoy ONVOY, LLC - PA 2019-03-28 yes yes
412-945 Bandwidth BANDWIDTH.COM CLEC, LLC - PA – 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
ONVOY, LLC - PA Onvoy 2 25%
BANDWIDTH.COM CLEC, LLC - PA Bandwidth 2 25%
TELEPORT COMMUNICATIONS AMERICA, LLC - PA AT&T 1 12.5%
VERIZON PENNSYLVANIA, INC. Verizon 1 12.5%
YMAX COMMUNICATIONS CORP. - PA – 1 12.5%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 12.5%

Frequently asked

Which prefixes belong to CLAIRTON in area code 412?

8 blocks: 226, 233, 274, 468, 533, 547, 743, 945. The table above gives the holder of each.

Which carriers have numbers in CLAIRTON?

ONVOY, LLC - PA (2 blocks), BANDWIDTH.COM CLEC, LLC - PA (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - PA (1 block), VERIZON PENNSYLVANIA, INC. (1 block), YMAX COMMUNICATIONS CORP. - PA (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES 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 CLAIRTON 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 412

All 762 prefixes in 412