Prefix Information

The prefix 623 is part of area code 301 serving Bethesda, Maryland.

This exchange contains 10,000 possible phone numbers (301-623-0000 through 301-623-9999).

Browse Numbers in This Prefix

301-623-0000-0999 301-623-1000-1999 301-623-2000-2999 301-623-3000-3999 301-623-4000-4999 301-623-5000-5999 301-623-6000-6999 301-623-7000-7999 301-623-8000-8999 301-623-9000-9999

Sample Numbers

(301) 623-0000 (301) 623-1234 (301) 623-2000 (301) 623-3333 (301) 623-4444 (301) 623-5555 (301) 623-6000 (301) 623-7777 (301) 623-8888 (301) 623-9999