NO IPL matches not considers as International Matches because it is Domestic league of India where foreign players allowed to play.
The only Indian to achieve this unique feat is Suresh Raina, who has so far made one Test hundred (120), three One Day International hundreds (116*, 106, 101) and one Twenty20 International hundred (101).
As of May 2012, the batsman who has scored the most runs in Twenty20 cricket is David Hussey, who has scored 4480 runs in 173 innings (from 180 matches), including a top score of 100 not out. His current Twenty20 average lies at 31.77.
Because the twenty20 matches are of 20 overs..
It is used in cricket for international matches.
3265 international ODI cricket matches have been played since the 1970s (the year of first ODI)
he ICC World Twenty20 (also referred to as the ICC World T20 or the World Twenty20) is the international championship of Twenty20 cricket. Organised by cricket's governing body, the International Cricket Council (ICC), the tournament consists of 12 teams, comprising all ten ICC full membersand two other ICC members chosen through theICC World Twenty20 Qualifier. The event is generally held every two years, and all matches are accorded Twenty20 Internationalstatus. The 2014 event will be a host to 16 nations. See the full list below.The inaugural event, the 2007 ICC World Twenty20, was staged in South Africa. Pakistan were originally selected to host it. It ran from 11-24 September 2007. The tournament was won by India, who became the first World T20 Champions after defeating Pakistan by 5 runs in the final at the Wanderers Stadium in Johannesburg.
As of November 2011, the player who has played the most Twenty20 matches is David Hussey - who has played in 159 games between 2004 and 2011.