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

MARTISFRRY prefixes in area code 740

NANPA records 5 assigned NXX blocks to rate center MARTISFRRY in area code 740, 0.6% 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. 4 holders hold those blocks, the largest being OHIO BELL TEL CO (2), AT&T ENTERPRISES, LLC (1), ONVOY, LLC - OH (1). The earliest assignment on record here is 2023-07-05 and the most recent 2023-07-05. 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 220 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 0.6% of 740
4 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
740-609 AT&T AT&T ENTERPRISES, LLC – yes yes
740-633 AT&T OHIO BELL TEL CO – no yes
740-635 AT&T OHIO BELL TEL CO – no yes
740-713 Onvoy ONVOY, LLC - OH 2023-07-05 yes yes
740-738 Bandwidth BANDWIDTH.COM CLEC, LLC - OH – 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
OHIO BELL TEL CO AT&T 2 40%
AT&T ENTERPRISES, LLC AT&T 1 20%
ONVOY, LLC - OH Onvoy 1 20%
BANDWIDTH.COM CLEC, LLC - OH Bandwidth 1 20%

Frequently asked

Which prefixes belong to MARTISFRRY in area code 740?

5 blocks: 609, 633, 635, 713, 738. The table above gives the holder of each.

Which carriers have numbers in MARTISFRRY?

OHIO BELL TEL CO (2 blocks), AT&T ENTERPRISES, LLC (1 block), ONVOY, LLC - OH (1 block), BANDWIDTH.COM CLEC, 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 MARTISFRRY 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