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

SUPERIOR prefixes in area code 520

NANPA records 7 assigned NXX blocks to rate center SUPERIOR in area code 520, 1.0% of the 699 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 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (1), ONVOY SPECTRUM, LLC (1), ONVOY, LLC - AZ (1). The earliest assignment on record here is 2016-03-22 and the most recent 2022-01-14. 7 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 402, 406, 531, 534 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 1% of 520
7 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
520-391 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM – yes yes
520-580 Charter ONVOY SPECTRUM, LLC 2021-06-28 yes yes
520-597 Onvoy ONVOY, LLC - AZ 2016-03-22 yes yes
520-655 FRACTEL, LLC 2020-06-02 yes yes
520-689 Lumen QWEST CORPORATION – yes yes
520-772 TON80 COMMUNICATIONS, LLC 2022-01-14 yes yes
520-827 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM Allstream 1 14.3%
ONVOY SPECTRUM, LLC Charter 1 14.3%
ONVOY, LLC - AZ Onvoy 1 14.3%
FRACTEL, LLC – 1 14.3%
QWEST CORPORATION Lumen 1 14.3%
TON80 COMMUNICATIONS, LLC – 1 14.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ Verizon 1 14.3%

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 SUPERIOR in area code 520?

7 blocks: 391, 580, 597, 655, 689, 772, 827. The table above gives the holder of each.

Which carriers have numbers in SUPERIOR?

ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (1 block), ONVOY SPECTRUM, LLC (1 block), ONVOY, LLC - AZ (1 block), FRACTEL, LLC (1 block), QWEST CORPORATION (1 block), TON80 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 SUPERIOR 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 520

All 699 prefixes in 520