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

DEXTERCITY prefixes in area code 740

NANPA records 4 assigned NXX blocks to rate center DEXTERCITY in area code 740, 0.5% 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. 3 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - OH (2), FRONTIER NORTH, INC. - OH (1), STRATUS NETWORKS (1). The earliest assignment on record here is 2002-06-26 and the most recent 2021-03-05. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.5% of 740
3 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
740-265 Lumen LEVEL 3 COMMUNICATIONS, LLC - OH 2002-08-16 yes yes
740-308 Lumen LEVEL 3 COMMUNICATIONS, LLC - OH 2002-06-26 yes yes
740-783 Frontier FRONTIER NORTH, INC. - OH – yes yes
740-798 STRATUS NETWORKS 2021-03-05 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
LEVEL 3 COMMUNICATIONS, LLC - OH Lumen 2 50%
FRONTIER NORTH, INC. - OH Frontier 1 25%
STRATUS NETWORKS – 1 25%

Frequently asked

Which prefixes belong to DEXTERCITY in area code 740?

4 blocks: 265, 308, 783, 798. The table above gives the holder of each.

Which carriers have numbers in DEXTERCITY?

LEVEL 3 COMMUNICATIONS, LLC - OH (2 blocks), FRONTIER NORTH, INC. - OH (1 block), STRATUS NETWORKS (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is DEXTERCITY 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