The custom-made aircraft “Air India One” is manufactured by which company?

The 'Air India One' was manufactured by Boeing and was handed over by them to Air India. It was custom made and will be used to fly the President, Prime Minister and Vice President. The Indian Air Force treats it as a VVIP flight and their Air Headquarters Communication squadron located in the Indira Gandhi International Airport, New Delhi operated this aircraft. The planes can fly from India and US in one go without the need for refueling in the way.