ALEX prefixes in area code 405
NANPA records 3 assigned NXX blocks to rate center ALEX in area code 405, 0.4% of the 783 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 NEW CINGULAR WIRELESS PCS, LLC - IL (1), ONVOY, LLC - OK (1), SOUTHWESTERN BELL (1). The earliest assignment on record here is 2002-05-16 and the most recent 2025-12-22. 3 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 572 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 405-351 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2002-05-16 | yes | yes |
| 405-405 | Onvoy ONVOY, LLC - OK | 2025-12-22 | yes | yes |
| 405-785 | AT&T SOUTHWESTERN BELL | – | 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
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 1 | 33.3% |
| ONVOY, LLC - OK | Onvoy | 1 | 33.3% |
| SOUTHWESTERN BELL | AT&T | 1 | 33.3% |
Frequently asked
Which prefixes belong to ALEX in area code 405?
3 blocks: 351, 405, 785. The table above gives the holder of each.
Which carriers have numbers in ALEX?
NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), ONVOY, LLC - OK (1 block), SOUTHWESTERN BELL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is ALEX 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.