312-213 Prefix — Chicgozn01, Illinois

Phone numbers starting with 312-213 are based in Chicgozn01, Illinois, primarily served by At&t.

Recently looked-up numbers in 312-213

• 312-213-8111

More about this region

Area code 312 directory · About area code 312 · Get a IL phone number

Last updated: July 13, 2026