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

EHRENBERG prefixes in area code 928

NANPA records 4 assigned NXX blocks to rate center EHRENBERG in area code 928, 0.6% 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. 4 holders hold those blocks, the largest being CSC VOICE, LLC (1), ONVOY, LLC - AZ (1), TON80 COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2022-02-16 and the most recent 2022-02-16. 4 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 928
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
928-264 CSC VOICE, LLC – yes yes
928-389 Onvoy ONVOY, LLC - AZ – yes yes
928-876 TON80 COMMUNICATIONS, LLC 2022-02-16 yes yes
928-923 Frontier FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - AZ – 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
CSC VOICE, LLC – 1 25%
ONVOY, LLC - AZ Onvoy 1 25%
TON80 COMMUNICATIONS, LLC – 1 25%
FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - AZ Frontier 1 25%

Frequently asked

Which prefixes belong to EHRENBERG in area code 928?

4 blocks: 264, 389, 876, 923. The table above gives the holder of each.

Which carriers have numbers in EHRENBERG?

CSC VOICE, LLC (1 block), ONVOY, LLC - AZ (1 block), TON80 COMMUNICATIONS, LLC (1 block), FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - AZ (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is EHRENBERG 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