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

CALDWELL prefixes in area code 740

NANPA records 6 assigned NXX blocks to rate center CALDWELL in area code 740, 0.8% 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. 5 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - OH (2), AERIAL COMMUNICATIONS, INC. (1), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH (1). The earliest assignment on record here is 2001-07-26 and the most recent 2003-08-22. 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 201, 208, 620, 862 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 0.8% of 740
5 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
740-305 Lumen LEVEL 3 COMMUNICATIONS, LLC - OH 2002-06-26 yes yes
740-365 Lumen LEVEL 3 COMMUNICATIONS, LLC - OH 2002-08-16 yes yes
740-459 T-Mobile AERIAL COMMUNICATIONS, INC. 2001-07-26 yes yes
740-509 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 2003-08-22 yes yes
740-581 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
740-732 Frontier FRONTIER NORTH, INC. - 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
LEVEL 3 COMMUNICATIONS, LLC - OH Lumen 2 33.3%
AERIAL COMMUNICATIONS, INC. T-Mobile 1 16.7%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH Verizon 1 16.7%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 16.7%
FRONTIER NORTH, INC. - OH Frontier 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 CALDWELL in area code 740?

6 blocks: 305, 365, 459, 509, 581, 732. The table above gives the holder of each.

Which carriers have numbers in CALDWELL?

LEVEL 3 COMMUNICATIONS, LLC - OH (2 blocks), AERIAL COMMUNICATIONS, INC. (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), FRONTIER NORTH, INC. - 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 CALDWELL 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