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

LITCHFIELD prefixes in area code 320

NANPA records 9 assigned NXX blocks to rate center LITCHFIELD in area code 320, 1.8% 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. 7 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN (2), ONVOY, LLC - MN (2), LEVEL 3 COMMUNICATIONS, LLC - MN (1). The earliest assignment on record here is 2003-01-13 and the most recent 2020-11-18. 7 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 207, 217, 308, 517 – overlay codes cover the same geography, so a rate center is served by all of them.

9 assigned blocks – 1.8% of 320
7 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
320-221 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN – yes yes
320-326 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 2003-01-13 yes yes
320-373 Onvoy ONVOY, LLC - MN 2003-03-04 yes yes
320-434 Lumen LEVEL 3 COMMUNICATIONS, LLC - MN 2004-12-09 yes yes
320-442 TEKSTAR COMMUNICATIONS, INC. 2020-11-18 yes yes
320-535 Onvoy ONVOY, LLC - MN 2005-09-10 yes yes
320-593 HUTCHINSON TELECOMMUNICATIONS, INC. – no yes
320-693 Lumen QWEST CORPORATION – no yes
320-699 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN Verizon 2 22.2%
ONVOY, LLC - MN Onvoy 2 22.2%
LEVEL 3 COMMUNICATIONS, LLC - MN Lumen 1 11.1%
TEKSTAR COMMUNICATIONS, INC. – 1 11.1%
HUTCHINSON TELECOMMUNICATIONS, INC. – 1 11.1%
QWEST CORPORATION Lumen 1 11.1%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 11.1%

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 LITCHFIELD in area code 320?

9 blocks: 221, 326, 373, 434, 442, 535, 593, 693, 699. The table above gives the holder of each.

Which carriers have numbers in LITCHFIELD?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN (2 blocks), ONVOY, LLC - MN (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - MN (1 block), TEKSTAR COMMUNICATIONS, INC. (1 block), HUTCHINSON TELECOMMUNICATIONS, INC. (1 block), QWEST CORPORATION (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LITCHFIELD 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