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

MILFDWH LK prefixes in area code 947

NANPA records 7 assigned NXX blocks to rate center MILFDWH LK in area code 947, 3.3% of the 211 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. 4 holders hold those blocks, the largest being ONVOY, LLCV - MI (3), NEW CINGULAR WIRELESS PCS, LLC - IL (2), TON80 COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2006-02-01 and the most recent 2023-06-26. 7 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 248 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 3.3% of 947
4 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
947-204 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2017-10-25 yes yes
947-256 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2022-10-04 yes yes
947-266 Onvoy ONVOY, LLCV - MI 2023-06-26 yes yes
947-466 TON80 COMMUNICATIONS, LLC 2022-01-11 yes yes
947-570 INTERACTIVE SERVICES NETWORK, INC. 2006-02-01 yes yes
947-666 Onvoy ONVOY, LLCV - MI 2016-04-25 yes yes
947-777 Onvoy ONVOY, LLCV - MI 2015-06-16 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
ONVOY, LLCV - MI Onvoy 3 42.9%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 28.6%
TON80 COMMUNICATIONS, LLC – 1 14.3%
INTERACTIVE SERVICES NETWORK, INC. – 1 14.3%

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 MILFDWH LK in area code 947?

7 blocks: 204, 256, 266, 466, 570, 666, 777. The table above gives the holder of each.

Which carriers have numbers in MILFDWH LK?

ONVOY, LLCV - MI (3 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), TON80 COMMUNICATIONS, LLC (1 block), INTERACTIVE SERVICES NETWORK, 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 MILFDWH LK 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 947

All 211 prefixes in 947