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

OBLONG prefixes in area code 618

NANPA records 3 assigned NXX blocks to rate center OBLONG in area code 618, 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. 2 holders hold those blocks, the largest being MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL (2), ODIN TELEPHONE EXCHANGE, INC. (1). The earliest assignment on record here is 2010-04-22 and the most recent 2010-04-22. 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 618
2 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
618-454 MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL – yes yes
618-480 MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 2010-04-22 yes yes
618-592 ODIN TELEPHONE EXCHANGE, INC. – no 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
MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL – 2 66.7%
ODIN TELEPHONE EXCHANGE, INC. – 1 33.3%

Frequently asked

Which prefixes belong to OBLONG in area code 618?

3 blocks: 454, 480, 592. The table above gives the holder of each.

Which carriers have numbers in OBLONG?

MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL (2 blocks), ODIN TELEPHONE EXCHANGE, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is OBLONG 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