312-720 Prefix — Chicgozn01, Illinois

Phone numbers starting with 312-720 are based in Chicgozn01, Illinois, primarily served by Verizon.

Recently looked-up numbers in 312-720

• 312-720-7753

More about this region

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

Last updated: September 30, 2026