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

KILKENNY prefixes in area code 507

NANPA records 3 assigned NXX blocks to rate center KILKENNY in area code 507, 0.4% of the 766 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. 2 holders hold those blocks, the largest being ONVOY, LLC - MN (2), FRONTIER COMMUNICATIONS OF MINNESOTA, INC. (1). The earliest assignment on record here is 2011-05-20 and the most recent 2011-05-20. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 507
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
507-576 Onvoy ONVOY, LLC - MN 2011-05-20 yes yes
507-595 Frontier FRONTIER COMMUNICATIONS OF MINNESOTA, INC. – yes yes
507-954 Onvoy ONVOY, LLC - MN – 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 - MN Onvoy 2 66.7%
FRONTIER COMMUNICATIONS OF MINNESOTA, INC. Frontier 1 33.3%

Frequently asked

Which prefixes belong to KILKENNY in area code 507?

3 blocks: 576, 595, 954. The table above gives the holder of each.

Which carriers have numbers in KILKENNY?

ONVOY, LLC - MN (2 blocks), FRONTIER COMMUNICATIONS OF MINNESOTA, 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 KILKENNY 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 507

All 766 prefixes in 507