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

KIESTER prefixes in area code 507

NANPA records 3 assigned NXX blocks to rate center KIESTER 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. 3 holders hold those blocks, the largest being CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN (1), LEVEL 3 COMMUNICATIONS, LLC - MN (1), ONVOY, LLC - MN (1). The earliest assignment on record here is 2006-11-29 and the most recent 2017-05-03. 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
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
507-294 Frontier CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN – yes yes
507-480 Lumen LEVEL 3 COMMUNICATIONS, LLC - MN 2017-05-03 yes yes
507-928 Onvoy ONVOY, LLC - MN 2006-11-29 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
CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN Frontier 1 33.3%
LEVEL 3 COMMUNICATIONS, LLC - MN Lumen 1 33.3%
ONVOY, LLC - MN Onvoy 1 33.3%

Frequently asked

Which prefixes belong to KIESTER in area code 507?

3 blocks: 294, 480, 928. The table above gives the holder of each.

Which carriers have numbers in KIESTER?

CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN (1 block), LEVEL 3 COMMUNICATIONS, LLC - MN (1 block), ONVOY, LLC - MN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is KIESTER 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