Air India is the flag carrier airline of India (IATA:AI, ICAO:AIC). it used to be known as Tata Airlines in 1926. Air India is a Star Alliance member, and it became the 27th in 2014.
Some people lie that Air India Regional is a separate airline from Air India and they lie that Air India's iata and icao is 9I LLR. 9I LLR is Thai Sky's iata and icao. Sometimes when you book Air India domestic, you get Air India Regional. By The way, Air India has a subsidiary called Alliance Air. Some people also lie and mistaken it as Thai Sky's IATA and ICAO. Alliance Air (IATA:CD, ICAO:CND). Air India Regional is also AI, AIC.
Airbus A321neo (TBA)
Airbus A350-900 (TBA)
Airbus A380 (TBA)