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

UNIONGROVE prefixes in area code 262

NANPA records 5 assigned NXX blocks to rate center UNIONGROVE 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. 4 holders hold those blocks, the largest being ONVOY, LLC - WI (2), LEVEL 3 COMMUNICATIONS, LLC - WI (1), TELEPORT COMMUNICATIONS AMERICA, LLC WI (1). The earliest assignment on record here is 2016-01-05 and the most recent 2024-02-29. 4 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 256, 704, 980 – overlay codes cover the same geography, so a rate center is served by all of them.

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

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
262-418 Onvoy ONVOY, LLC - WI 2024-02-29 yes yes
262-558 Lumen LEVEL 3 COMMUNICATIONS, LLC - WI – yes yes
262-747 Onvoy ONVOY, LLC - WI 2016-01-05 yes yes
262-864 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC WI – yes yes
262-878 AT&T WISCONSIN BELL INC – no 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 2 40%
LEVEL 3 COMMUNICATIONS, LLC - WI Lumen 1 20%
TELEPORT COMMUNICATIONS AMERICA, LLC WI AT&T 1 20%
WISCONSIN BELL INC AT&T 1 20%

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 UNIONGROVE in area code 262?

5 blocks: 418, 558, 747, 864, 878. The table above gives the holder of each.

Which carriers have numbers in UNIONGROVE?

ONVOY, LLC - WI (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - WI (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC WI (1 block), WISCONSIN BELL INC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is UNIONGROVE 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