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

SHEBOYGAN prefixes in area code 920

NANPA records 33 assigned NXX blocks to rate center SHEBOYGAN in area code 920, 4.2% of the 785 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. 11 holders hold those blocks, the largest being WISCONSIN BELL INC (9), NEW CINGULAR WIRELESS PCS, LLC - IL (6), UNITED STATES CELLULAR - WI (4). The earliest assignment on record here is 2001-02-05 and the most recent 2023-11-14. 20 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 274 – overlay codes cover the same geography, so a rate center is served by all of them.

33 assigned blocks – 4.2% of 920
11 holders of record
20 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
920-207 UNITED STATES CELLULAR - WI – yes yes
920-208 AT&T WISCONSIN BELL INC – no yes
920-226 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
920-254 T-Mobile METROPCS, INC. – yes yes
920-287 Lumen LEVEL 3 COMMUNICATIONS, LLC - WI – yes yes
920-331 T-Mobile METROPCS, INC. – yes yes
920-334 Verizon NEW CELL DBA CELLCOM – no yes
920-377 T-Mobile METROPCS, INC. – yes yes
920-395 AT&T WISCONSIN BELL INC 2001-06-18 yes yes
920-451 AT&T WISCONSIN BELL INC – no yes
920-452 AT&T WISCONSIN BELL INC – no yes
920-453 AT&T WISCONSIN BELL INC – yes yes
920-457 AT&T WISCONSIN BELL INC – no yes
920-458 AT&T WISCONSIN BELL INC – no yes
920-459 AT&T WISCONSIN BELL INC – no yes
920-476 Lumen LEVEL 3 TELECOM OF WISCONSIN, LP - WI – yes yes
920-547 Lumen LEVEL 3 COMMUNICATIONS, LLC - WI 2002-03-25 yes yes
920-576 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
920-577 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
920-627 UNITED STATES CELLULAR - WI – yes yes
920-694 Windstream PAETEC ITEL, LLC – yes yes
920-698 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2001-02-05 yes yes
920-783 Windstream PAETEC ITEL, LLC 2001-02-08 yes yes
920-803 AT&T WISCONSIN BELL INC – no yes
920-814 TDS TDS METROCOM, LLC 2023-03-10 yes yes
920-889 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI – no yes
920-912 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
920-917 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
920-918 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – no yes
920-919 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
920-943 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2023-11-14 yes yes
920-946 UNITED STATES CELLULAR - WI – yes yes
920-980 UNITED STATES CELLULAR - WI – 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
WISCONSIN BELL INC AT&T 9 27.3%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 6 18.2%
UNITED STATES CELLULAR - WI – 4 12.1%
METROPCS, INC. T-Mobile 3 9.1%
AMERICAN MESSAGING SERVICES, LLC American Messaging 3 9.1%
LEVEL 3 COMMUNICATIONS, LLC - WI Lumen 2 6.1%
PAETEC ITEL, LLC Windstream 2 6.1%
NEW CELL DBA CELLCOM Verizon 1 3%
LEVEL 3 TELECOM OF WISCONSIN, LP - WI Lumen 1 3%
TDS METROCOM, LLC TDS 1 3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI Verizon 1 3%

Frequently asked

Which prefixes belong to SHEBOYGAN in area code 920?

33 blocks: 207, 208, 226, 254, 287, 331, 334, 377, 395, 451, 452, 453 and 21 more, all listed in the table above.

Which carriers have numbers in SHEBOYGAN?

WISCONSIN BELL INC (9 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (6 blocks), UNITED STATES CELLULAR - WI (4 blocks), METROPCS, INC. (3 blocks), AMERICAN MESSAGING SERVICES, LLC (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - WI (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SHEBOYGAN 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 920

All 785 prefixes in 920