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

HARLAN prefixes in area code 712

NANPA records 8 assigned NXX blocks to rate center HARLAN in area code 712, 1.3% 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. 7 holders hold those blocks, the largest being WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS (2), FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY - IA (1), FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY (1). The earliest assignment on record here is 2001-03-20 and the most recent 2021-03-12. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 260, 541, 606 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1.3% of 712
7 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
712-235 FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY - IA 2001-03-20 no yes
712-236 FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY 2001-03-28 no yes
712-280 Windstream WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 2018-01-31 yes yes
712-404 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2005-12-30 yes yes
712-572 Onvoy ONVOY, LLC - IA 2021-03-12 yes yes
712-733 AUREON COMMUNICATIONS, LLC 2001-05-10 no yes
712-744 FARMERS MUTUAL COOP. TEL. CO. – no yes
712-755 Windstream WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS – 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
WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS Windstream 2 25%
FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY - IA – 1 12.5%
FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY – 1 12.5%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 12.5%
ONVOY, LLC - IA Onvoy 1 12.5%
AUREON COMMUNICATIONS, LLC – 1 12.5%
FARMERS MUTUAL COOP. TEL. CO. – 1 12.5%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to HARLAN in area code 712?

8 blocks: 235, 236, 280, 404, 572, 733, 744, 755. The table above gives the holder of each.

Which carriers have numbers in HARLAN?

WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS (2 blocks), FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY - IA (1 block), FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), ONVOY, LLC - IA (1 block), AUREON 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 HARLAN 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