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

MORRISON prefixes in area code 815

NANPA records 4 assigned NXX blocks to rate center MORRISON in area code 815, 0.5% 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 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (2), MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL (1), AERO NORTH COMMUNICATIONS, INC. - IL (1). The earliest assignment on record here is 2010-02-15 and the most recent 2010-02-15. 2 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 codes 573, 580 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 815
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
815-400 MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 2010-02-15 yes yes
815-583 AERO NORTH COMMUNICATIONS, INC. - IL – no yes
815-772 Frontier CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL – no yes
815-956 Frontier CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -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
CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL Frontier 2 50%
MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL – 1 25%
AERO NORTH COMMUNICATIONS, INC. - IL – 1 25%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to MORRISON in area code 815?

4 blocks: 400, 583, 772, 956. The table above gives the holder of each.

Which carriers have numbers in MORRISON?

CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (2 blocks), MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL (1 block), AERO NORTH COMMUNICATIONS, INC. - 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 MORRISON 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