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

HARTFORDCY prefixes in area code 765

NANPA records 7 assigned NXX blocks to rate center HARTFORDCY in area code 765, 1.0% of the 725 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. 6 holders hold those blocks, the largest being INDIANA BELL TEL CO INC (2), NEW CINGULAR WIRELESS PCS, LLC - IL (1), TELEPORT COMMUNICATIONS AMERICA, LLC - IN (1). The earliest assignment on record here is 2002-02-13 and the most recent 2002-02-13. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

7 assigned blocks – 1% of 765
6 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
765-329 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
765-330 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IN – yes yes
765-331 AT&T INDIANA BELL TEL CO INC – yes yes
765-347 Lumen LEVEL 3 TELECOM OF INDIANA, LP - IN – yes yes
765-348 AT&T INDIANA BELL TEL CO INC – no yes
765-499 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 2002-02-13 yes yes
765-510 Lumen LEVEL 3 COMMUNICATIONS, LLC - IN 2002-02-13 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
INDIANA BELL TEL CO INC AT&T 2 28.6%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 14.3%
TELEPORT COMMUNICATIONS AMERICA, LLC - IN AT&T 1 14.3%
LEVEL 3 TELECOM OF INDIANA, LP - IN Lumen 1 14.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN Verizon 1 14.3%
LEVEL 3 COMMUNICATIONS, LLC - IN Lumen 1 14.3%

Frequently asked

Which prefixes belong to HARTFORDCY in area code 765?

7 blocks: 329, 330, 331, 347, 348, 499, 510. The table above gives the holder of each.

Which carriers have numbers in HARTFORDCY?

INDIANA BELL TEL CO INC (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - IN (1 block), LEVEL 3 TELECOM OF INDIANA, LP - IN (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN (1 block), LEVEL 3 COMMUNICATIONS, LLC - IN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is HARTFORDCY 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 765

All 725 prefixes in 765