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

COAL CITY prefixes in area code 815

NANPA records 5 assigned NXX blocks to rate center COAL CITY in area code 815, 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. 5 holders hold those blocks, the largest being CENTURYLINK COMMUNICATIONS, LLC (1), FIRST COMMUNICATIONS, LLC (1), ILLINOIS BELL TEL CO (1). The earliest assignment on record here is 2001-10-23 and the most recent 2019-02-18. 5 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 779 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 0.6% of 815
5 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
815-205 Lumen CENTURYLINK COMMUNICATIONS, LLC 2014-01-31 yes yes
815-518 FIRST COMMUNICATIONS, LLC 2001-10-23 yes yes
815-634 AT&T ILLINOIS BELL TEL CO – yes yes
815-655 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2019-02-18 yes yes
815-709 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL 2001-12-28 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
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 20%
FIRST COMMUNICATIONS, LLC – 1 20%
ILLINOIS BELL TEL CO AT&T 1 20%
TELEPORT COMMUNICATIONS AMERICA, LLC - IL AT&T 1 20%
LEVEL 3 COMMUNICATIONS, LLC - IL Lumen 1 20%

Frequently asked

Which prefixes belong to COAL CITY in area code 815?

5 blocks: 205, 518, 634, 655, 709. The table above gives the holder of each.

Which carriers have numbers in COAL CITY?

CENTURYLINK COMMUNICATIONS, LLC (1 block), FIRST COMMUNICATIONS, LLC (1 block), ILLINOIS BELL TEL CO (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - IL (1 block), LEVEL 3 COMMUNICATIONS, LLC - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is COAL CITY 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 815

All 786 prefixes in 815