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

GRATIOT prefixes in area code 740

NANPA records 3 assigned NXX blocks to rate center GRATIOT in area code 740, 0.4% of the 786 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. 2 holders hold those blocks, the largest being WINDSTREAM OHIO, LLC (2), ONVOY, LLC - OH (1). The earliest assignment on record here is 2016-05-12 and the most recent 2017-06-01. 3 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 608 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 740
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
740-665 Onvoy ONVOY, LLC - OH 2016-05-12 yes yes
740-723 Windstream WINDSTREAM OHIO, LLC 2017-06-01 yes yes
740-787 Windstream WINDSTREAM OHIO, 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
WINDSTREAM OHIO, LLC Windstream 2 66.7%
ONVOY, LLC - OH Onvoy 1 33.3%

Frequently asked

Which prefixes belong to GRATIOT in area code 740?

3 blocks: 665, 723, 787. The table above gives the holder of each.

Which carriers have numbers in GRATIOT?

WINDSTREAM OHIO, LLC (2 blocks), ONVOY, LLC - OH (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is GRATIOT 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 740

All 786 prefixes in 740