Prefix Information

The prefix 312 is part of area code 303 serving Denver, Colorado.

This exchange contains 10,000 possible phone numbers (303-312-0000 through 303-312-9999).

Browse Numbers in This Prefix

303-312-0000-0999 303-312-1000-1999 303-312-2000-2999 303-312-3000-3999 303-312-4000-4999 303-312-5000-5999 303-312-6000-6999 303-312-7000-7999 303-312-8000-8999 303-312-9000-9999

Sample Numbers

(303) 312-0000 (303) 312-1234 (303) 312-2000 (303) 312-3333 (303) 312-4444 (303) 312-5555 (303) 312-6000 (303) 312-7777 (303) 312-8888 (303) 312-9999