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

MIDWEST CY prefixes in area code 405

NANPA records 16 assigned NXX blocks to rate center MIDWEST CY in area code 405, 2.0% 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. 6 holders hold those blocks, the largest being SOUTHWESTERN BELL (10), COMCAST IP PHONE, LLC (2), TELEPORT COMMUNICATIONS AMERICA OK - LLC (1). The earliest assignment on record here is 2008-06-19 and the most recent 2017-03-13. 10 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.

16 assigned blocks – 2% of 405
6 holders of record
10 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
405-455 Comcast COMCAST IP PHONE, LLC – yes yes
405-458 AT&T TELEPORT COMMUNICATIONS AMERICA OK - LLC 2010-01-18 yes yes
405-582 AT&T SOUTHWESTERN BELL 2008-06-19 yes yes
405-610 Comcast COMCAST IP PHONE, LLC – yes yes
405-622 Windstream PAETEC ITEL, LLC – yes yes
405-731 Onvoy ONVOY, LLC - OK 2013-07-05 yes yes
405-732 AT&T SOUTHWESTERN BELL – no yes
405-733 AT&T SOUTHWESTERN BELL – no yes
405-734 AT&T SOUTHWESTERN BELL – no yes
405-736 AT&T SOUTHWESTERN BELL – no yes
405-737 AT&T SOUTHWESTERN BELL – no yes
405-739 AT&T SOUTHWESTERN BELL – no yes
405-741 AT&T SOUTHWESTERN BELL – yes yes
405-855 AT&T SOUTHWESTERN BELL 2015-03-04 yes yes
405-869 AT&T SOUTHWESTERN BELL – yes yes
405-931 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 2017-03-13 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
SOUTHWESTERN BELL AT&T 10 62.5%
COMCAST IP PHONE, LLC Comcast 2 12.5%
TELEPORT COMMUNICATIONS AMERICA OK - LLC AT&T 1 6.2%
PAETEC ITEL, LLC Windstream 1 6.2%
ONVOY, LLC - OK Onvoy 1 6.2%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK Verizon 1 6.2%

Frequently asked

Which prefixes belong to MIDWEST CY in area code 405?

16 blocks: 455, 458, 582, 610, 622, 731, 732, 733, 734, 736, 737, 739 and 4 more, all listed in the table above.

Which carriers have numbers in MIDWEST CY?

SOUTHWESTERN BELL (10 blocks), COMCAST IP PHONE, LLC (2 blocks), TELEPORT COMMUNICATIONS AMERICA OK - LLC (1 block), PAETEC ITEL, LLC (1 block), ONVOY, LLC - OK (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES 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 MIDWEST CY 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 405

All 783 prefixes in 405