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

CASS LAKE prefixes in area code 218

NANPA records 5 assigned NXX blocks to rate center CASS LAKE in area code 218, 0.7% of the 708 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. 5 holders hold those blocks, the largest being QWEST CORPORATION (1), TEKSTAR COMMUNICATIONS, INC. (1), BANDWIDTH.COM CLEC, LLC - MN (1). The earliest assignment on record here is 2003-01-07 and the most recent 2020-03-13. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

5 assigned blocks – 0.7% of 218
5 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
218-335 Lumen QWEST CORPORATION – yes yes
218-339 TEKSTAR COMMUNICATIONS, INC. 2003-01-07 no yes
218-518 Bandwidth BANDWIDTH.COM CLEC, LLC - MN 2020-03-13 yes yes
218-975 Onvoy ONVOY, LLC - MN 2007-04-24 yes yes
218-987 PAUL BUNYAN RURAL TELEPHONE COOP. 2006-08-18 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
QWEST CORPORATION Lumen 1 20%
TEKSTAR COMMUNICATIONS, INC. – 1 20%
BANDWIDTH.COM CLEC, LLC - MN Bandwidth 1 20%
ONVOY, LLC - MN Onvoy 1 20%
PAUL BUNYAN RURAL TELEPHONE COOP. – 1 20%

Frequently asked

Which prefixes belong to CASS LAKE in area code 218?

5 blocks: 335, 339, 518, 975, 987. The table above gives the holder of each.

Which carriers have numbers in CASS LAKE?

QWEST CORPORATION (1 block), TEKSTAR COMMUNICATIONS, INC. (1 block), BANDWIDTH.COM CLEC, LLC - MN (1 block), ONVOY, LLC - MN (1 block), PAUL BUNYAN RURAL TELEPHONE COOP. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CASS LAKE 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 218

All 708 prefixes in 218