Prefix Information

The prefix 312 is part of area code 331 serving Aurora, Illinois.

This exchange contains 10,000 possible phone numbers (331-312-0000 through 331-312-9999).

Browse Numbers in This Prefix

331-312-0000-0999 331-312-1000-1999 331-312-2000-2999 331-312-3000-3999 331-312-4000-4999 331-312-5000-5999 331-312-6000-6999 331-312-7000-7999 331-312-8000-8999 331-312-9000-9999

Sample Numbers

(331) 312-0000 (331) 312-1234 (331) 312-2000 (331) 312-3333 (331) 312-4444 (331) 312-5555 (331) 312-6000 (331) 312-7777 (331) 312-8888 (331) 312-9999