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

AMBOY prefixes in area code 765

NANPA records 5 assigned NXX blocks to rate center AMBOY in area code 765, 0.7% 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. 5 holders hold those blocks, the largest being SPOK, INC. (1), TELEPORT COMMUNICATIONS AMERICA, LLC - IN (1), INDIANA BELL TEL CO INC (1). The earliest assignment on record here is 2016-03-14 and the most recent 2022-02-24. 4 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 360, 507, 815 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 0.7% of 765
5 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
765-272 Spok SPOK, INC. – no yes
765-391 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IN – yes yes
765-395 AT&T INDIANA BELL TEL CO INC – yes yes
765-600 Onvoy ONVOY, LLC - IN 2016-03-14 yes yes
765-996 TON80 COMMUNICATIONS, LLC 2022-02-24 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
SPOK, INC. Spok 1 20%
TELEPORT COMMUNICATIONS AMERICA, LLC - IN AT&T 1 20%
INDIANA BELL TEL CO INC AT&T 1 20%
ONVOY, LLC - IN Onvoy 1 20%
TON80 COMMUNICATIONS, LLC – 1 20%

Frequently asked

Which prefixes belong to AMBOY in area code 765?

5 blocks: 272, 391, 395, 600, 996. The table above gives the holder of each.

Which carriers have numbers in AMBOY?

SPOK, INC. (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - IN (1 block), INDIANA BELL TEL CO INC (1 block), ONVOY, LLC - IN (1 block), TON80 COMMUNICATIONS, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is AMBOY 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