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

ROCKTON prefixes in area code 815

NANPA records 3 assigned NXX blocks to rate center ROCKTON in area code 815, 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 AERO NORTH COMMUNICATIONS, INC. - IL (1), FRONTIER NORTH, INC. - IL (1), LEVEL 3 COMMUNICATIONS, LLC - IL (1). The earliest assignment on record here is 2003-05-27 and the most recent 2005-02-22. 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 code 779 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 815
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
815-619 AERO NORTH COMMUNICATIONS, INC. - IL 2003-05-27 no yes
815-624 Frontier FRONTIER NORTH, INC. - IL – yes yes
815-957 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL 2005-02-22 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
AERO NORTH COMMUNICATIONS, INC. - IL – 1 33.3%
FRONTIER NORTH, INC. - IL Frontier 1 33.3%
LEVEL 3 COMMUNICATIONS, LLC - IL Lumen 1 33.3%

Frequently asked

Which prefixes belong to ROCKTON in area code 815?

3 blocks: 619, 624, 957. The table above gives the holder of each.

Which carriers have numbers in ROCKTON?

AERO NORTH COMMUNICATIONS, INC. - IL (1 block), FRONTIER NORTH, INC. - 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 ROCKTON 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