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

RINGLING prefixes in area code 580

NANPA records 3 assigned NXX blocks to rate center RINGLING in area code 580, 0.4% 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. 3 holders hold those blocks, the largest being ONVOY, LLC - OK (1), SOUTHWESTERN BELL (1), CHICKASAW TELECOMMUNICAIONS SERVICES, INC. (1). The earliest assignment on record here is 2003-03-05 and the most recent 2003-03-05. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 580
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
580-289 Onvoy ONVOY, LLC - OK – yes yes
580-662 AT&T SOUTHWESTERN BELL – yes yes
580-663 CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 2003-03-05 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 - OK Onvoy 1 33.3%
SOUTHWESTERN BELL AT&T 1 33.3%
CHICKASAW TELECOMMUNICAIONS SERVICES, INC. – 1 33.3%

Frequently asked

Which prefixes belong to RINGLING in area code 580?

3 blocks: 289, 662, 663. The table above gives the holder of each.

Which carriers have numbers in RINGLING?

ONVOY, LLC - OK (1 block), SOUTHWESTERN BELL (1 block), CHICKASAW TELECOMMUNICAIONS SERVICES, 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 RINGLING 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