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

MCDOWELL prefixes in area code 606

NANPA records 3 assigned NXX blocks to rate center MCDOWELL in area code 606, 0.5% 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. 3 holders hold those blocks, the largest being AT&T ENTERPRISES, LLC (1), BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (1), ONVOY, LLC - KY (1). The earliest assignment on record here is 2014-06-23 and the most recent 2023-06-30. 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 540 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.5% of 606
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
606-357 AT&T AT&T ENTERPRISES, LLC 2014-06-23 yes yes
606-377 AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL – no yes
606-415 Onvoy ONVOY, LLC - KY 2023-06-30 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
AT&T ENTERPRISES, LLC AT&T 1 33.3%
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL AT&T 1 33.3%
ONVOY, LLC - KY Onvoy 1 33.3%

Frequently asked

Which prefixes belong to MCDOWELL in area code 606?

3 blocks: 357, 377, 415. The table above gives the holder of each.

Which carriers have numbers in MCDOWELL?

AT&T ENTERPRISES, LLC (1 block), BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (1 block), ONVOY, 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 MCDOWELL 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