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

CARMI prefixes in area code 618

NANPA records 5 assigned NXX blocks to rate center CARMI in area code 618, 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. 4 holders hold those blocks, the largest being FRONTIER NORTH, INC. - IL (2), MCC NETWORK SERVICES, LLC (1), NEW CINGULAR WIRELESS PCS, LLC - GA (1). The earliest assignment on record here is 2001-12-06 and the most recent 2002-06-11. 5 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

5 assigned blocks – 0.6% of 618
4 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
618-380 MCC NETWORK SERVICES, LLC 2002-06-11 yes yes
618-382 Frontier FRONTIER NORTH, INC. - IL – yes yes
618-383 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2001-12-06 yes yes
618-384 Frontier FRONTIER NORTH, INC. - IL – yes yes
618-387 Telnyx TELNYX LLC – 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
FRONTIER NORTH, INC. - IL Frontier 2 40%
MCC NETWORK SERVICES, LLC – 1 20%
NEW CINGULAR WIRELESS PCS, LLC - GA AT&T 1 20%
TELNYX LLC Telnyx 1 20%

Frequently asked

Which prefixes belong to CARMI in area code 618?

5 blocks: 380, 382, 383, 384, 387. The table above gives the holder of each.

Which carriers have numbers in CARMI?

FRONTIER NORTH, INC. - IL (2 blocks), MCC NETWORK SERVICES, LLC (1 block), NEW CINGULAR WIRELESS PCS, LLC - GA (1 block), TELNYX 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 CARMI 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 618

All 786 prefixes in 618