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

HAVRE prefixes in area code 406

NANPA records 7 assigned NXX blocks to rate center HAVRE in area code 406, 0.9% of the 754 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 (2), NEW CINGULAR WIRELESS PCS, LLC (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (1). The earliest assignment on record here is 2009-11-11 and the most recent 2017-04-27. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

7 assigned blocks – 0.9% of 406
5 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
406-262 Lumen QWEST CORPORATION – yes yes
406-265 Lumen QWEST CORPORATION – no yes
406-344 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT – yes yes
406-400 TRIANGLE COMMUNICATION SYSTEM, INC. - MT- 2017-04-27 yes yes
406-808 Lumen CENTURYLINK COMMUNICATIONS, LLC – yes yes
406-879 AT&T NEW CINGULAR WIRELESS PCS, LLC 2009-11-11 yes yes
406-945 AT&T NEW CINGULAR WIRELESS PCS, LLC – 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
QWEST CORPORATION Lumen 2 28.6%
NEW CINGULAR WIRELESS PCS, LLC AT&T 2 28.6%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT Verizon 1 14.3%
TRIANGLE COMMUNICATION SYSTEM, INC. - MT- – 1 14.3%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 14.3%

Frequently asked

Which prefixes belong to HAVRE in area code 406?

7 blocks: 262, 265, 344, 400, 808, 879, 945. The table above gives the holder of each.

Which carriers have numbers in HAVRE?

QWEST CORPORATION (2 blocks), NEW CINGULAR WIRELESS PCS, LLC (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (1 block), TRIANGLE COMMUNICATION SYSTEM, INC. - MT- (1 block), CENTURYLINK COMMUNICATIONS, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is HAVRE 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 406

All 754 prefixes in 406