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

FIATT prefixes in area code 309

NANPA records 3 assigned NXX blocks to rate center FIATT in area code 309, 0.4% 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 AT&T ENTERPRISES, LLC (1), ILLINOIS BELL TEL CO (1), TON80 COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2011-12-21 and the most recent 2022-02-17. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 309
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
309-425 AT&T AT&T ENTERPRISES, LLC 2011-12-21 yes yes
309-789 AT&T ILLINOIS BELL TEL CO – yes yes
309-996 TON80 COMMUNICATIONS, LLC 2022-02-17 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
AT&T ENTERPRISES, LLC AT&T 1 33.3%
ILLINOIS BELL TEL CO AT&T 1 33.3%
TON80 COMMUNICATIONS, LLC – 1 33.3%

Frequently asked

Which prefixes belong to FIATT in area code 309?

3 blocks: 425, 789, 996. The table above gives the holder of each.

Which carriers have numbers in FIATT?

AT&T ENTERPRISES, LLC (1 block), ILLINOIS BELL TEL CO (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 FIATT 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 309

All 786 prefixes in 309