Only the residents of the state Andhra Pradesh should contact:

Consulate General of the United States of America, Hyderabad
Paigah Palace
1-8-323, Chiran Fort Lane
Begumpet,
Secunderabad 500 003

Phone: +91 (40) 4033-8300
Consular Section Customer Service Unit: Between 2:00 pm and 4:00pm weekdays at +91 (40) 4033-8300. Callers must restrict their inquiries to urgent/emergency matters.

Emails:
Non-Immigrant Visas: HydNIV@state.gov
Passport/Visa Fraud: HydFPU@state.gov

Web site

The Consular Office Hours of operation:

Hours: 8:30am to 5:00pm, Monday through Friday

Consulate is closed on both U.S. and Indian holidays.

As the U.S. consulate in Hyderabad currently does not process immigrant visas, all such candidates still need to go to the U.S. consulate in Chennai as before.