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

SIGOURNEY prefixes in area code 641

NANPA records 4 assigned NXX blocks to rate center SIGOURNEY in area code 641, 0.7% of the 584 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (2), LOCAL TELEPHONE DATA SERVICES CORP. (1), WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (1). The earliest assignment on record here is 2001-09-12 and the most recent 2001-09-12. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.7% of 641
3 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
641-224 LOCAL TELEPHONE DATA SERVICES CORP. 2001-09-12 yes yes
641-541 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA – yes yes
641-622 Windstream WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH – yes yes
641-790 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA – 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA Verizon 2 50%
LOCAL TELEPHONE DATA SERVICES CORP. – 1 25%
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH Windstream 1 25%

Frequently asked

Which prefixes belong to SIGOURNEY in area code 641?

4 blocks: 224, 541, 622, 790. The table above gives the holder of each.

Which carriers have numbers in SIGOURNEY?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (2 blocks), LOCAL TELEPHONE DATA SERVICES CORP. (1 block), WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SIGOURNEY 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 641

All 584 prefixes in 641