313-378 Prefix — Detroitzn6, Michigan

Phone numbers starting with 313-378 are based in Detroitzn6, Michigan, primarily served by T-Mobile.

Recently looked-up numbers in 313-378

• 313-378-1107

More about this region

Area code 313 directory · About area code 313 · Get a MI phone number

Last updated: July 5, 2026