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

MEDICAL LK prefixes in area code 509

NANPA records 3 assigned NXX blocks to rate center MEDICAL LK in area code 509, 0.4% of the 763 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 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK (1), LEVEL 3 TELECOM OF WASHINGTON, LLC - WA (1), COMCAST IP PHONE, LLC (1). The earliest assignment on record here is 2023-04-03 and the most recent 2023-04-03. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 509
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
509-299 Lumen CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK – yes yes
509-565 Lumen LEVEL 3 TELECOM OF WASHINGTON, LLC - WA – yes yes
509-825 Comcast COMCAST IP PHONE, LLC 2023-04-03 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
CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK Lumen 1 33.3%
LEVEL 3 TELECOM OF WASHINGTON, LLC - WA Lumen 1 33.3%
COMCAST IP PHONE, LLC Comcast 1 33.3%

Frequently asked

Which prefixes belong to MEDICAL LK in area code 509?

3 blocks: 299, 565, 825. The table above gives the holder of each.

Which carriers have numbers in MEDICAL LK?

CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK (1 block), LEVEL 3 TELECOM OF WASHINGTON, LLC - WA (1 block), COMCAST IP PHONE, 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 MEDICAL 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 509

All 763 prefixes in 509