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

CARLINVL prefixes in area code 217

NANPA records 3 assigned NXX blocks to rate center CARLINVL in area code 217, 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 TELEPORT COMMUNICATIONS AMERICA, LLC - IL (1), CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (1), LEVEL 3 COMMUNICATIONS, LLC - IL (1). The earliest assignment on record here is 2016-02-23 and the most recent 2016-02-23. 2 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 217
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
217-716 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2016-02-23 yes yes
217-854 Frontier CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL – no yes
217-930 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL – 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
TELEPORT COMMUNICATIONS AMERICA, LLC - IL AT&T 1 33.3%
CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL Frontier 1 33.3%
LEVEL 3 COMMUNICATIONS, LLC - IL Lumen 1 33.3%

Frequently asked

Which prefixes belong to CARLINVL in area code 217?

3 blocks: 716, 854, 930. The table above gives the holder of each.

Which carriers have numbers in CARLINVL?

TELEPORT COMMUNICATIONS AMERICA, LLC - IL (1 block), CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -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 CARLINVL 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 217

All 786 prefixes in 217