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

PIMA prefixes in area code 928

NANPA records 10 assigned NXX blocks to rate center PIMA in area code 928, 1.6% of the 637 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. 6 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (3), BANDWIDTH.COM CLEC, LLC - AZ (2), ONVOY, LLC - AZ (2). The earliest assignment on record here is 2010-09-03 and the most recent 2026-10-26. 10 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

10 assigned blocks – 1.6% of 928
6 holders of record
10 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
928-228 Bandwidth BANDWIDTH.COM CLEC, LLC - AZ 2010-09-03 yes yes
928-298 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 2013-03-15 yes yes
928-316 Lumen CENTURYLINK COMMUNICATIONS, LLC 2015-06-05 yes yes
928-320 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 2022-06-01 yes yes
928-361 Bandwidth BANDWIDTH.COM CLEC, LLC - AZ 2020-04-15 yes yes
928-393 Onvoy ONVOY, LLC - AZ 2020-12-22 yes yes
928-413 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 2021-08-11 yes yes
928-485 Lumen QWEST CORPORATION – yes yes
928-506 Onvoy ONVOY, LLC - AZ 2023-06-26 yes yes
928-568 IP HORIZON LLC 2026-10-26 yes no

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 - AZ Verizon 3 30%
BANDWIDTH.COM CLEC, LLC - AZ Bandwidth 2 20%
ONVOY, LLC - AZ Onvoy 2 20%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 10%
QWEST CORPORATION Lumen 1 10%
IP HORIZON LLC – 1 10%

Frequently asked

Which prefixes belong to PIMA in area code 928?

10 blocks: 228, 298, 316, 320, 361, 393, 413, 485, 506, 568. The table above gives the holder of each.

Which carriers have numbers in PIMA?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (3 blocks), BANDWIDTH.COM CLEC, LLC - AZ (2 blocks), ONVOY, LLC - AZ (2 blocks), CENTURYLINK COMMUNICATIONS, LLC (1 block), QWEST CORPORATION (1 block), IP HORIZON 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 PIMA 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 928

All 637 prefixes in 928