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

HAWARDEN prefixes in area code 712

NANPA records 4 assigned NXX blocks to rate center HAWARDEN in area code 712, 0.6% of the 633 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (1), NEW CINGULAR WIRELESS PCS, LLC - IL (1), HAWARDEN MUNICIPAL UTILITIES (1). The earliest assignment on record here is 2006-10-18 and the most recent 2013-06-04. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.6% of 712
4 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
712-422 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 2013-06-04 yes yes
712-550 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2006-10-18 no yes
712-551 HAWARDEN MUNICIPAL UTILITIES – yes yes
712-552 HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS – 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 1 25%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 25%
HAWARDEN MUNICIPAL UTILITIES – 1 25%
HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS – 1 25%

Frequently asked

Which prefixes belong to HAWARDEN in area code 712?

4 blocks: 422, 550, 551, 552. The table above gives the holder of each.

Which carriers have numbers in HAWARDEN?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), HAWARDEN MUNICIPAL UTILITIES (1 block), HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is HAWARDEN 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 712

All 633 prefixes in 712