h4 visa slots
U.S. Visa Appointment FAQ - Immihelp
In a proactive move to streamline the visa application process, the US Embassy has now made available a quarter of a million new visa appointment slots.
AVITS Website
This extension reschedules US Visa application appointment to an earlier date automatically - AIS Visa Slots.
Pokivenge
Crowdsourced availability of visa appointment slots. Track consular and biometric availability of B1, B2, F, F1, F2, H1, H4, I, J1, J2, L1 and L2 visa appointments.