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

HERRIN prefixes in area code 618

NANPA records 12 assigned NXX blocks to rate center HERRIN in area code 618, 1.5% 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. 5 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (7), FRONTIER NORTH, INC. - IL (2), NOVACOM, INC. (1). The earliest assignment on record here is 2021-11-30 and the most recent 2023-07-18. 11 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 730 – overlay codes cover the same geography, so a rate center is served by all of them.

12 assigned blocks – 1.5% of 618
5 holders of record
11 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
618-333 NOVACOM, INC. – no yes
618-727 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
618-810 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2021-11-30 yes yes
618-849 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2022-05-09 yes yes
618-850 Twilio TWILIO INTERNATIONAL, INC. – yes yes
618-913 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2023-01-11 yes yes
618-916 NUSO, LLC 2023-02-08 yes yes
618-925 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
618-942 Frontier FRONTIER NORTH, INC. - IL – yes yes
618-951 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2023-06-12 yes yes
618-957 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2023-07-18 yes yes
618-988 Frontier FRONTIER NORTH, INC. - 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 7 58.3%
FRONTIER NORTH, INC. - IL Frontier 2 16.7%
NOVACOM, INC. – 1 8.3%
TWILIO INTERNATIONAL, INC. Twilio 1 8.3%
NUSO, LLC – 1 8.3%

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 HERRIN in area code 618?

12 blocks: 333, 727, 810, 849, 850, 913, 916, 925, 942, 951, 957, 988. The table above gives the holder of each.

Which carriers have numbers in HERRIN?

NEW CINGULAR WIRELESS PCS, LLC - IL (7 blocks), FRONTIER NORTH, INC. - IL (2 blocks), NOVACOM, INC. (1 block), TWILIO INTERNATIONAL, INC. (1 block), NUSO, 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 HERRIN 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