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

MILLWOOD prefixes in area code 574

NANPA records 4 assigned NXX blocks to rate center MILLWOOD in area code 574, 1.0% of the 403 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 NEW CINGULAR WIRELESS PCS, LLC - IL (2), FRONTIER NORTH, INC.. - IN (1), LEVEL 3 COMMUNICATIONS, LLC - IN (1). The earliest assignment on record here is 2002-05-10 and the most recent 2002-05-10. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 1% of 574
3 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
574-227 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
574-305 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
574-646 Frontier FRONTIER NORTH, INC.. - IN – yes yes
574-907 Lumen LEVEL 3 COMMUNICATIONS, LLC - IN 2002-05-10 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 2 50%
FRONTIER NORTH, INC.. - IN Frontier 1 25%
LEVEL 3 COMMUNICATIONS, LLC - IN Lumen 1 25%

Frequently asked

Which prefixes belong to MILLWOOD in area code 574?

4 blocks: 227, 305, 646, 907. The table above gives the holder of each.

Which carriers have numbers in MILLWOOD?

NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), FRONTIER NORTH, INC.. - IN (1 block), LEVEL 3 COMMUNICATIONS, LLC - IN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MILLWOOD 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 574

All 403 prefixes in 574