312-231 Prefix — Arligtnhts, Illinois

Phone numbers starting with 312-231 are based in Arligtnhts, Illinois, primarily served by T-Mobile.

Recently looked-up numbers in 312-231

• 312-231-2486

More about this region

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

Last updated: April 2, 2026