Prefix Information

The prefix 312 is part of area code 301 serving Bethesda, Maryland.

This exchange contains 10,000 possible phone numbers (301-312-0000 through 301-312-9999).

Browse Numbers in This Prefix

301-312-0000-0999 301-312-1000-1999 301-312-2000-2999 301-312-3000-3999 301-312-4000-4999 301-312-5000-5999 301-312-6000-6999 301-312-7000-7999 301-312-8000-8999 301-312-9000-9999

Sample Numbers

(301) 312-0000 (301) 312-1234 (301) 312-2000 (301) 312-3333 (301) 312-4444 (301) 312-5555 (301) 312-6000 (301) 312-7777 (301) 312-8888 (301) 312-9999