Prefix 313-339 — Detroit Zone 05, MI

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

313-339 identifies a block of numbers in Detroit Zone 05, MI, within the 313 area code. Every US prefix is tied to exactly one rate center; this one is Detroit Zone 05.

The rate center lies in the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area. The serving LATA is 340. Local time follows the Eastern zone.

Treat the on-screen number as a hint, not evidence — 313-339 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.

The assigned code holder is NEW CINGULAR WIRELESS PCS, LLC - IL, operating company number 6534, assigned January 13, 2025. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

Neighboring prefixes

FAQ

Where is 313-339 located?

The prefix is assigned to the Detroit Zone 05 rate center in MI, area code 313. It is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area.

Which company owns 313-339 numbers?

NEW CINGULAR WIRELESS PCS, LLC - IL 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 313-339 safe to answer?

The prefix itself says nothing about the caller. Legitimate Detroit Zone 05 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.