A proper company will be listed in Ministry of company affairs website.
Go to the link and search for the company you wish to search. From this you will know when and where it was registered.
A good company would write its history in a neat format, from the humble beginning and achievements till date.
Check out the domain here also.
So next time when u go for any interview check all these…
Google search the address mentioned. Confirm the address and co name. And , then proceed as you wish.
Thanks to all the inputs from