Prefix 612-421 — Twin Cities, MN

NANPA CO code assignment, current as of July 28, 2026.

Area code
612
Prefix (NXX)
421
Rate center
Twin Cities
State
Minnesota
Time zone
Central
Code holder
ONVOY, LLC - MN
OCN
184D
Pooled
Yes (thousands-block pooling)
Assigned
2018-11-30
LATA
628

612-421 identifies a block of numbers in Twin Cities, MN, within the 612 area code. Every US prefix is tied to exactly one rate center; this one is Twin Cities.

The rate center lies in the Minneapolis-St. Paul-Bloomington, MN-WI Metropolitan Statistical Area. The serving LATA is 628. Local time follows the Central zone.

Treat the on-screen number as a hint, not evidence — 612-421 can be spoofed like any US prefix. If a call feels off, verify through an official callback number and file a complaint with the FCC or FTC.

Code-holder of record: ONVOY, LLC - MN (OCN 184D), assigned November 30, 2018. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 612-421 numbers may be served by different companies.

Neighboring prefixes

Prefixes adjacent to 612-421
PrefixRate centerCode holder
612-418 Twin Cities CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN
612-419 Twin Cities CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN
612-420 Twin Cities QWEST CORPORATION
612-422 Twin Cities NEW CINGULAR WIRELESS PCS, LLC - IL
612-423 Twin Cities AERIAL COMMUNICATIONS, INC.
612-424 Twin Cities LEVEL 3 COMMUNICATIONS, LLC - MN

FAQ

Where is 612-421 located?

The prefix is assigned to the Twin Cities rate center in MN, area code 612. It is part of the Minneapolis-St. Paul-Bloomington, MN-WI Metropolitan Statistical Area.

Which company owns 612-421 numbers?

ONVOY, LLC - MN holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.

Is a call from 612-421 safe to answer?

The prefix itself says nothing about the caller. Legitimate Twin Cities businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.