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

WARSAW prefixes in area code 859

NANPA records 6 assigned NXX blocks to rate center WARSAW in area code 859, 1.1% of the 563 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 - KY (2), CINCINNATI BELL (1), TON80 COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2001-01-07 and the most recent 2022-02-24. 6 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 217, 472, 574, 585 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 1.1% of 859
5 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
859-203 Onvoy ONVOY, LLC - KY 2016-03-16 yes yes
859-567 Altafiber CINCINNATI BELL – yes yes
859-832 Onvoy ONVOY, LLC - KY 2001-01-07 yes yes
859-837 TON80 COMMUNICATIONS, LLC 2022-02-24 yes yes
859-904 Lumen LEVEL 3 COMMUNICATIONS, LLC - KY – yes yes
859-935 Windstream PAETEC ITEL, LLC – 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 - KY Onvoy 2 33.3%
CINCINNATI BELL Altafiber 1 16.7%
TON80 COMMUNICATIONS, LLC – 1 16.7%
LEVEL 3 COMMUNICATIONS, LLC - KY Lumen 1 16.7%
PAETEC ITEL, LLC Windstream 1 16.7%

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 WARSAW in area code 859?

6 blocks: 203, 567, 832, 837, 904, 935. The table above gives the holder of each.

Which carriers have numbers in WARSAW?

ONVOY, LLC - KY (2 blocks), CINCINNATI BELL (1 block), TON80 COMMUNICATIONS, LLC (1 block), LEVEL 3 COMMUNICATIONS, LLC - KY (1 block), PAETEC ITEL, 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 WARSAW 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 859

All 563 prefixes in 859