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

ATWATER prefixes in area code 320

NANPA records 3 assigned NXX blocks to rate center ATWATER in area code 320, 0.6% of the 511 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 ONVOY, LLC - MN (1), TON80 COMMUNICATIONS, LLC (1), CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN (1). The earliest assignment on record here is 2004-01-19 and the most recent 2022-02-22. 2 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 codes 209, 234, 330, 350 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.6% of 320
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
320-337 Onvoy ONVOY, LLC - MN 2004-01-19 yes yes
320-546 TON80 COMMUNICATIONS, LLC 2022-02-22 yes yes
320-974 Frontier CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN – no 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 1 33.3%
TON80 COMMUNICATIONS, LLC – 1 33.3%
CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN Frontier 1 33.3%

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 ATWATER in area code 320?

3 blocks: 337, 546, 974. The table above gives the holder of each.

Which carriers have numbers in ATWATER?

ONVOY, LLC - MN (1 block), TON80 COMMUNICATIONS, LLC (1 block), CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-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 ATWATER 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 320

All 511 prefixes in 320