Prefix Information

The prefix 123 is part of area code 303 serving Denver, Colorado.

This exchange contains 10,000 possible phone numbers (303-123-0000 through 303-123-9999).

Browse Numbers in This Prefix

303-123-0000-0999 303-123-1000-1999 303-123-2000-2999 303-123-3000-3999 303-123-4000-4999 303-123-5000-5999 303-123-6000-6999 303-123-7000-7999 303-123-8000-8999 303-123-9000-9999

Sample Numbers

(303) 123-0000 (303) 123-1234 (303) 123-2000 (303) 123-3333 (303) 123-4444 (303) 123-5555 (303) 123-6000 (303) 123-7777 (303) 123-8888 (303) 123-9999