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

WILLIAMSBY prefixes in area code 262

NANPA records 5 assigned NXX blocks to rate center WILLIAMSBY in area code 262, 0.8% of the 634 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. 5 holders hold those blocks, the largest being ONVOY, LLC - WI (1), WISCONSIN BELL INC (1), UNITED STATES CELLULAR - WI (1). The earliest assignment on record here is 2002-07-22 and the most recent 2021-06-02. 5 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

5 assigned blocks – 0.8% of 262
5 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
262-205 Onvoy ONVOY, LLC - WI 2016-03-08 yes yes
262-245 AT&T WISCONSIN BELL INC – yes yes
262-607 UNITED STATES CELLULAR - WI 2002-07-22 yes yes
262-686 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC WI – yes yes
262-892 Charter ONVOY SPECTRUM, LLC 2021-06-02 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 - WI Onvoy 1 20%
WISCONSIN BELL INC AT&T 1 20%
UNITED STATES CELLULAR - WI – 1 20%
TELEPORT COMMUNICATIONS AMERICA, LLC WI AT&T 1 20%
ONVOY SPECTRUM, LLC Charter 1 20%

Frequently asked

Which prefixes belong to WILLIAMSBY in area code 262?

5 blocks: 205, 245, 607, 686, 892. The table above gives the holder of each.

Which carriers have numbers in WILLIAMSBY?

ONVOY, LLC - WI (1 block), WISCONSIN BELL INC (1 block), UNITED STATES CELLULAR - WI (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC WI (1 block), ONVOY SPECTRUM, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WILLIAMSBY 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 262

All 634 prefixes in 262