The A Visas are some best visas to obtain for non-immigrants with the desire to live and travel in the United States. It is well known as the diplomatic visa or official visa, and is especially purposed for officials from other countries or diplomats who wish to enter the United States.
Because there are several levels of diplomacy and different categories of government officials, the United States issues three different types of A Visas:
A-1 Visa
A-1 visas are issued to ambassadors, public ministers, career diplomats, and consular officers.
Immediate family and relatives of these officials (as defined in 22 C.F.R. 41.21) are also accepted under A-1 status. The A-1 visa allows foreign visitors to enjoy a variety of freedoms in the United States.
A-2 Visa
A-2 visas honor foreign government officials or employees coming into the U.S. The A-2 visa is granted for the Duration of Status (D/S). The A-2 classification may include foreign military personnel on a temporary assignment in the U.S. other than NATO orders. Passports only need to be valid on the date of admission and no foreign residence is required. Immediate family that does not qualify for A-1 or A-3 status is also accepted under A-2 status.
A-3 Visa
A-3 visas are granted to the employees, servants and attendants of officials and employees who hold an A-1 or A-2 visa. The family of these visa holders are also accepted under A-3 status.