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

BLACKWELL prefixes in area code 580

NANPA records 5 assigned NXX blocks to rate center BLACKWELL in area code 580, 0.7% of the 741 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. 5 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (1), SOUTHWESTERN BELL (1), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK (1). The earliest assignment on record here is 2002-03-13 and the most recent 2002-10-15. 4 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 325 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 0.7% of 580
5 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
580-262 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
580-363 AT&T SOUTHWESTERN BELL – no yes
580-670 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 2002-10-15 yes yes
580-789 Lumen LEVEL 3 COMMUNICATIONS, LLC - OK 2002-03-13 yes yes
580-833 Onvoy ONVOY, LLC - OK – 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 20%
SOUTHWESTERN BELL AT&T 1 20%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK Verizon 1 20%
LEVEL 3 COMMUNICATIONS, LLC - OK Lumen 1 20%
ONVOY, LLC - OK Onvoy 1 20%

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 BLACKWELL in area code 580?

5 blocks: 262, 363, 670, 789, 833. The table above gives the holder of each.

Which carriers have numbers in BLACKWELL?

NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), SOUTHWESTERN BELL (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK (1 block), LEVEL 3 COMMUNICATIONS, LLC - OK (1 block), ONVOY, LLC - OK (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is BLACKWELL 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 580

All 741 prefixes in 580