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

CUMBERLAND prefixes in area code 606

NANPA records 5 assigned NXX blocks to rate center CUMBERLAND in area code 606, 0.8% of the 639 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 WINDSTREAM KENTUCKY EAST, INC. - LONDON (2), INTER MOUNTAIN CABLE DBA MIKROTEC COMMUNICATIONS (1), EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS (1). The earliest assignment on record here is 2008-10-31 and the most recent 2018-04-11. 4 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 207, 227, 240, 301 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 0.8% of 606
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
606-446 INTER MOUNTAIN CABLE DBA MIKROTEC COMMUNICATIONS 2013-01-16 yes yes
606-508 EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 2008-10-31 yes yes
606-589 Windstream WINDSTREAM KENTUCKY EAST, INC. - LONDON – no yes
606-719 Windstream WINDSTREAM KENTUCKY EAST, INC. - LONDON 2015-04-21 yes yes
606-894 Lumen LEVEL 3 COMMUNICATIONS, LLC - KY 2018-04-11 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
WINDSTREAM KENTUCKY EAST, INC. - LONDON Windstream 2 40%
INTER MOUNTAIN CABLE DBA MIKROTEC COMMUNICATIONS – 1 20%
EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS – 1 20%
LEVEL 3 COMMUNICATIONS, LLC - KY Lumen 1 20%

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 CUMBERLAND in area code 606?

5 blocks: 446, 508, 589, 719, 894. The table above gives the holder of each.

Which carriers have numbers in CUMBERLAND?

WINDSTREAM KENTUCKY EAST, INC. - LONDON (2 blocks), INTER MOUNTAIN CABLE DBA MIKROTEC COMMUNICATIONS (1 block), EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS (1 block), LEVEL 3 COMMUNICATIONS, LLC - KY (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CUMBERLAND 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 606

All 639 prefixes in 606