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

HOWELLS prefixes in area code 531

NANPA records 3 assigned NXX blocks to rate center HOWELLS in area code 531, 1.1% of the 267 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 ONVOY, LLC - NE (1), UNITED STATES CELLULAR - NE (1), AERIAL COMMUNICATIONS, INC. (1). The earliest assignment on record here is 2018-04-27 and the most recent 2026-02-05. 3 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 code 402 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 1.1% of 531
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
531-223 Onvoy ONVOY, LLC - NE 2018-04-27 yes yes
531-275 UNITED STATES CELLULAR - NE 2021-04-16 yes yes
531-435 T-Mobile AERIAL COMMUNICATIONS, INC. 2026-02-05 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
ONVOY, LLC - NE Onvoy 1 33.3%
UNITED STATES CELLULAR - NE – 1 33.3%
AERIAL COMMUNICATIONS, INC. T-Mobile 1 33.3%

Frequently asked

Which prefixes belong to HOWELLS in area code 531?

3 blocks: 223, 275, 435. The table above gives the holder of each.

Which carriers have numbers in HOWELLS?

ONVOY, LLC - NE (1 block), UNITED STATES CELLULAR - NE (1 block), AERIAL COMMUNICATIONS, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is HOWELLS 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 531

All 267 prefixes in 531