Prefix Information

The prefix 403 is part of area code 303 serving Denver, Colorado.

This exchange contains 10,000 possible phone numbers (303-403-0000 through 303-403-9999).

Browse Numbers in This Prefix

303-403-0000-0999 303-403-1000-1999 303-403-2000-2999 303-403-3000-3999 303-403-4000-4999 303-403-5000-5999 303-403-6000-6999 303-403-7000-7999 303-403-8000-8999 303-403-9000-9999

Sample Numbers

(303) 403-0000 (303) 403-1234 (303) 403-2000 (303) 403-3333 (303) 403-4444 (303) 403-5555 (303) 403-6000 (303) 403-7777 (303) 403-8888 (303) 403-9999