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

IROQUOIS prefixes in area code 605

NANPA records 3 assigned NXX blocks to rate center IROQUOIS in area code 605, 0.4% of the 745 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 AIRUS, INC. - SD (1), QWEST CORPORATION (1), TON80 COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2020-05-21 and the most recent 2022-01-14. 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 605
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
605-316 AIRUS, INC. - SD 2020-05-21 yes yes
605-546 Lumen QWEST CORPORATION – yes yes
605-898 TON80 COMMUNICATIONS, LLC 2022-01-14 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
AIRUS, INC. - SD – 1 33.3%
QWEST CORPORATION Lumen 1 33.3%
TON80 COMMUNICATIONS, LLC – 1 33.3%

Frequently asked

Which prefixes belong to IROQUOIS in area code 605?

3 blocks: 316, 546, 898. The table above gives the holder of each.

Which carriers have numbers in IROQUOIS?

AIRUS, INC. - SD (1 block), QWEST CORPORATION (1 block), TON80 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 IROQUOIS 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 605

All 745 prefixes in 605