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

NORTHFIELD prefixes in area code 507

NANPA records 14 assigned NXX blocks to rate center NORTHFIELD in area code 507, 1.8% of the 766 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. 5 holders hold those blocks, the largest being ONVOY, LLC - MN (5), AERIAL COMMUNICATIONS, INC. (3), QWEST CORPORATION (3). The earliest assignment on record here is 2001-12-14 and the most recent 2021-10-13. 12 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 234, 330, 413, 715 – overlay codes cover the same geography, so a rate center is served by all of them.

14 assigned blocks – 1.8% of 507
5 holders of record
12 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
507-222 Onvoy ONVOY, LLC - MN – yes yes
507-301 T-Mobile AERIAL COMMUNICATIONS, INC. 2001-12-14 yes yes
507-321 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
507-366 Onvoy ONVOY, LLC - MN – yes yes
507-403 T-Mobile AERIAL COMMUNICATIONS, INC. 2002-10-10 yes yes
507-581 T-Mobile AERIAL COMMUNICATIONS, INC. 2002-04-25 yes yes
507-645 Lumen QWEST CORPORATION – no yes
507-646 Onvoy ONVOY, LLC - MN – yes yes
507-649 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN – yes yes
507-650 Onvoy ONVOY, LLC - MN – yes yes
507-663 Lumen QWEST CORPORATION – no yes
507-664 Lumen QWEST CORPORATION – yes yes
507-786 Onvoy ONVOY, LLC - MN – yes yes
507-850 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2021-10-13 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
ONVOY, LLC - MN Onvoy 5 35.7%
AERIAL COMMUNICATIONS, INC. T-Mobile 3 21.4%
QWEST CORPORATION Lumen 3 21.4%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 14.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN Verizon 1 7.1%

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 NORTHFIELD in area code 507?

14 blocks: 222, 301, 321, 366, 403, 581, 645, 646, 649, 650, 663, 664 and 2 more, all listed in the table above.

Which carriers have numbers in NORTHFIELD?

ONVOY, LLC - MN (5 blocks), AERIAL COMMUNICATIONS, INC. (3 blocks), QWEST CORPORATION (3 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is NORTHFIELD 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 507

All 766 prefixes in 507