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

ST JOSEPH prefixes in area code 320

NANPA records 4 assigned NXX blocks to rate center ST JOSEPH in area code 320, 0.8% 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. 4 holders hold those blocks, the largest being ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (1), QWEST CORPORATION (1), LEVEL 3 COMMUNICATIONS, LLC - MN (1). The earliest assignment on record here is 2004-11-30 and the most recent 2006-08-22. 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 217, 269, 318, 570 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.8% of 320
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
320-271 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM – yes yes
320-363 Lumen QWEST CORPORATION – yes yes
320-433 Lumen LEVEL 3 COMMUNICATIONS, LLC - MN 2004-11-30 yes yes
320-557 Charter CHARTER IP ENABLED SERVICES, LLC 2006-08-22 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
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM Allstream 1 25%
QWEST CORPORATION Lumen 1 25%
LEVEL 3 COMMUNICATIONS, LLC - MN Lumen 1 25%
CHARTER IP ENABLED SERVICES, LLC Charter 1 25%

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 ST JOSEPH in area code 320?

4 blocks: 271, 363, 433, 557. The table above gives the holder of each.

Which carriers have numbers in ST JOSEPH?

ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (1 block), QWEST CORPORATION (1 block), LEVEL 3 COMMUNICATIONS, LLC - MN (1 block), CHARTER IP ENABLED SERVICES, 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 ST JOSEPH 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