WTTG 5 FOX 5151 Wisconsin Avenue NW Washington, DC 20016
202-244-5151 (main phone) 202-895-3000 (news phone) 202-895-3133 (news fax) 202-244-1745 (main fax)
and here’s their on-linen contact form:
http://www.myfoxdc.com/myfox/pages/InsideFox/ContactUs