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

MONTEVIDEO prefixes in area code 320

NANPA records 7 assigned NXX blocks to rate center MONTEVIDEO in area code 320, 1.4% 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN (3), ONVOY, LLC - MN (2), QWEST CORPORATION (1). The earliest assignment on record here is 2003-01-13 and the most recent 2020-03-31. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

7 assigned blocks – 1.4% of 320
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
320-226 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN – no yes
320-269 Lumen QWEST CORPORATION – yes yes
320-301 Onvoy ONVOY, LLC - MN 2011-11-14 yes yes
320-321 Onvoy ONVOY, LLC - MN 2004-01-21 yes yes
320-397 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 2003-01-13 yes yes
320-435 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 2020-03-31 yes yes
320-841 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 3 42.9%
ONVOY, LLC - MN Onvoy 2 28.6%
QWEST CORPORATION Lumen 1 14.3%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 14.3%

Frequently asked

Which prefixes belong to MONTEVIDEO in area code 320?

7 blocks: 226, 269, 301, 321, 397, 435, 841. The table above gives the holder of each.

Which carriers have numbers in MONTEVIDEO?

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

Is MONTEVIDEO 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