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

HOLMESCITY prefixes in area code 320

NANPA records 3 assigned NXX blocks to rate center HOLMESCITY in area code 320, 0.6% of the 511 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. 2 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - MN (2), CENTURYLINK OF MINNESOTA, INC. (1). The earliest assignment on record here is 2002-07-29 and the most recent 2005-02-22. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.6% of 320
2 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
320-270 Lumen LEVEL 3 COMMUNICATIONS, LLC - MN 2002-07-29 yes yes
320-432 Lumen LEVEL 3 COMMUNICATIONS, LLC - MN 2005-02-22 yes yes
320-886 Lumen CENTURYLINK OF MINNESOTA, INC. – no 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
LEVEL 3 COMMUNICATIONS, LLC - MN Lumen 2 66.7%
CENTURYLINK OF MINNESOTA, INC. Lumen 1 33.3%

Frequently asked

Which prefixes belong to HOLMESCITY in area code 320?

3 blocks: 270, 432, 886. The table above gives the holder of each.

Which carriers have numbers in HOLMESCITY?

LEVEL 3 COMMUNICATIONS, LLC - MN (2 blocks), CENTURYLINK OF MINNESOTA, 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 HOLMESCITY 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 320

All 511 prefixes in 320