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

NORBORNE prefixes in area code 660

NANPA records 3 assigned NXX blocks to rate center NORBORNE in area code 660, 0.6% of the 518 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 LEVEL 3 COMMUNICATIONS, LLC - MO (1), GREEN HILLS TELECOMMUNICATIONS SERVICES (1), EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO (1). The earliest assignment on record here is 2002-08-09 and the most recent 2002-08-09. 3 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 660
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
660-250 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2002-08-09 yes yes
660-593 GREEN HILLS TELECOMMUNICATIONS SERVICES – yes yes
660-594 Lumen EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO – 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
LEVEL 3 COMMUNICATIONS, LLC - MO Lumen 1 33.3%
GREEN HILLS TELECOMMUNICATIONS SERVICES – 1 33.3%
EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO Lumen 1 33.3%

Frequently asked

Which prefixes belong to NORBORNE in area code 660?

3 blocks: 250, 593, 594. The table above gives the holder of each.

Which carriers have numbers in NORBORNE?

LEVEL 3 COMMUNICATIONS, LLC - MO (1 block), GREEN HILLS TELECOMMUNICATIONS SERVICES (1 block), EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is NORBORNE 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 660

All 518 prefixes in 660