In India if you are planning to buy an Aircraft for private or business usage, DGCA of India maintains the record of all the aircrafts. To get to know the status of the plane, registration no is required though it is possible to search with Operator name.
The registration number of aircrafts in Indian starts with VT which was used at time of British rule in India. To search an airplane you can use number of seats, registration number, categories, Operator Name, Aircraft Type and Classification.
Here is a sample search result which gives you clear details of Aircraft Type, Serial no, Registration no and date,Weight , seating capacity, type of engine and no of engine, Owner of the Aircraft, Who is operating it, year of manufacture and category.
You can make your search here and look around for more details which is listed on the site like Approved Firms and notice etc.