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

WINTERSET prefixes in area code 515

NANPA records 17 assigned NXX blocks to rate center WINTERSET in area code 515, 2.9% of the 578 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. 9 holders hold those blocks, the largest being UNITED STATES CELLULAR - IA (9), COMMIO, LLC (1), BANDWIDTH.COM CLEC, LLC - IA (1). The earliest assignment on record here is 2010-03-08 and the most recent 2025-03-21. 17 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

17 assigned blocks – 2.9% of 515
9 holders of record
17 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
515-340 COMMIO, LLC 2023-09-13 yes yes
515-384 Bandwidth BANDWIDTH.COM CLEC, LLC - IA 2021-11-22 yes yes
515-462 Lumen QWEST CORPORATION – yes yes
515-468 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA – yes yes
515-474 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2018-08-20 yes yes
515-493 MCC TELEPHONY OF IOWA, LLC - IA 2010-03-08 yes yes
515-705 Lumen LEVEL 3 COMMUNICATIONS, LLC - IA 2010-03-10 yes yes
515-728 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-739 OMNITEL COMMUNICATIONS, INC. - IA 2015-07-07 yes yes
515-801 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-804 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-806 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-810 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-818 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-819 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-841 UNITED STATES CELLULAR - IA 2025-03-21 yes yes
515-905 UNITED STATES CELLULAR - IA 2025-03-21 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
UNITED STATES CELLULAR - IA – 9 52.9%
COMMIO, LLC – 1 5.9%
BANDWIDTH.COM CLEC, LLC - IA Bandwidth 1 5.9%
QWEST CORPORATION Lumen 1 5.9%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA Verizon 1 5.9%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 5.9%
MCC TELEPHONY OF IOWA, LLC - IA – 1 5.9%
LEVEL 3 COMMUNICATIONS, LLC - IA Lumen 1 5.9%
OMNITEL COMMUNICATIONS, INC. - IA – 1 5.9%

Frequently asked

Which prefixes belong to WINTERSET in area code 515?

17 blocks: 340, 384, 462, 468, 474, 493, 705, 728, 739, 801, 804, 806 and 5 more, all listed in the table above.

Which carriers have numbers in WINTERSET?

UNITED STATES CELLULAR - IA (9 blocks), COMMIO, LLC (1 block), BANDWIDTH.COM CLEC, LLC - IA (1 block), QWEST CORPORATION (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WINTERSET 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 515

All 578 prefixes in 515