Final answer:
The headquarters of Zeta Phi Beta is located at 1734 New Hampshire Avenue NW, Washington, D.C. It is an international historically black sorority founded at Howard University.
Step-by-step explanation:
The address to Zeta Phi Beta headquarters is 1734 New Hampshire Avenue NW, Washington, D.C. This sorority was founded in 1920 at Howard University, and its headquarters are located in the notable Dupont Circle neighborhood. Zeta Phi Beta is an international historically black sorority and is a member of the National Pan-Hellenic Council, an umbrella organization for nine historically African-American sororities and fraternities.