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

CASSELTON prefixes in area code 701

NANPA records 6 assigned NXX blocks to rate center CASSELTON in area code 701, 0.8% of the 743 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. 4 holders hold those blocks, the largest being ONVOY, LLC - ND (2), NEW CINGULAR WIRELESS PCS, LLC - IL (2), MIDCONTINENT COMMUNICATIONS - ND (1). The earliest assignment on record here is 2006-09-08 and the most recent 2019-08-12. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

6 assigned blocks – 0.8% of 701
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
701-346 MIDCONTINENT COMMUNICATIONS - ND 2007-09-14 yes yes
701-347 Lumen QWEST CORPORATION – yes yes
701-501 Onvoy ONVOY, LLC - ND 2019-08-12 yes yes
701-506 Onvoy ONVOY, LLC - ND – yes yes
701-660 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2010-11-11 yes yes
701-895 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2006-09-08 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 - ND Onvoy 2 33.3%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 33.3%
MIDCONTINENT COMMUNICATIONS - ND – 1 16.7%
QWEST CORPORATION Lumen 1 16.7%

Frequently asked

Which prefixes belong to CASSELTON in area code 701?

6 blocks: 346, 347, 501, 506, 660, 895. The table above gives the holder of each.

Which carriers have numbers in CASSELTON?

ONVOY, LLC - ND (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), MIDCONTINENT COMMUNICATIONS - ND (1 block), QWEST CORPORATION (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CASSELTON 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 701

All 743 prefixes in 701