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

WINFIELD prefixes in area code 620

NANPA records 10 assigned NXX blocks to rate center WINFIELD in area code 620, 1.4% of the 705 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 SOUTHWESTERN BELL (4), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS (1), T-MOBILE USA, INC. (1). The earliest assignment on record here is 2001-06-08 and the most recent 2023-01-27. 9 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 205, 304, 319, 430 – overlay codes cover the same geography, so a rate center is served by all of them.

10 assigned blocks – 1.4% of 620
7 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
620-218 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 2003-01-03 yes yes
620-221 AT&T SOUTHWESTERN BELL – no yes
620-222 AT&T SOUTHWESTERN BELL – yes yes
620-229 AT&T SOUTHWESTERN BELL – yes yes
620-262 T-Mobile T-MOBILE USA, INC. – yes yes
620-301 Comcast COMCAST IP PHONE, LLC 2017-11-02 yes yes
620-402 Lumen LEVEL 3 COMMUNICATIONS, LLC - KS – yes yes
620-590 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2022-03-18 yes yes
620-705 AT&T SOUTHWESTERN BELL 2001-06-08 yes yes
620-880 COMMIO, LLC 2023-01-27 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 4 40%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS Verizon 1 10%
T-MOBILE USA, INC. T-Mobile 1 10%
COMCAST IP PHONE, LLC Comcast 1 10%
LEVEL 3 COMMUNICATIONS, LLC - KS Lumen 1 10%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 10%
COMMIO, LLC – 1 10%

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 WINFIELD in area code 620?

10 blocks: 218, 221, 222, 229, 262, 301, 402, 590, 705, 880. The table above gives the holder of each.

Which carriers have numbers in WINFIELD?

SOUTHWESTERN BELL (4 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS (1 block), T-MOBILE USA, INC. (1 block), COMCAST IP PHONE, LLC (1 block), LEVEL 3 COMMUNICATIONS, LLC - KS (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WINFIELD 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 620

All 705 prefixes in 620