New Delhi: The national carrier, Air India after a four-year merger with the Indian Airlines will now have single code for all its domestic and international flights from Sunday.

The merger of Indian Airlines with Air India took place in May 2007.

The codes of all 'IC' coded flights have been changed to 'AI' and the airline has made arrangements to inform passengers about revised flight numbers through short message service (SMS), telephone calls and travel agents.

The airline has also advised passengers to contact its toll free number 18001801407 to check their revised flight number.

In addition to the core PSS Module, SITA also provided various modules like revenue management system, revenue accounting system, IOCC and hub control, internet booking engine and loyalty plus etc.

Post- amalgamation, having two separate flights and IATA codes was the biggest hindrance for the national carrier to become a STAR alliance member. Lufthansa, Continental Airlines, Austrian Airlines, Swiss Air, Singapore Airlines, Air China, Air Canada, Air New Zealand, South Africa Airways and others have 21,000 daily departures at 1160 airports in 181 countries.

"This amalgamation will be a major step in Air India becoming an active partner of STAR alliance which has the most respected member airlines," the spokesperson said.