| ITC1 | 1955 | Copenhagen, Denmark
| The First International Congress on the Application of the Theory of Probability in Telephone Engineering and Administration |
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| ITC2 | 1958 | The Hague, Netherlands | The Second International Congress on the Application of the Theory of Probability in Telephone Engineering and Administration |
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| ITC3 | 1961 | Paris, France | Troisieme Congres International de Teletrafic |
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| ITC4 | 1964 | London, UK | Fourth International Teletraffic Congress |
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| ITC5 | 1967 | New-York, USA | Fifth International Teletraffic Congress |
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| ITC6 | 1970 | Munich, Germany | Sixth International Teletraffic Congress |
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| ITC7 | 1973 | Stockholm, Sweden | Application of the Theory of Probability to Telecommunication Research, Engineering and Administration |
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| ITC8 | 1976 | Melbourne, Australia | Eigth International Teletraffic Congress |
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| ITC9 | 1979 | Torremolinos, Spain | Ninth International Teletraffic Congress
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| ITC10 | 1983 | Montreal, Canada | Tenth International Teletraffic Congress |
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| ITC11 | 1985 | Kyoto, Japan | Teletraffic issues in an advanced information society |
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| ITC12 | 1998 | Torino, Italia | Teletraffic Science for New Cost-effective Systems, Networks and Services |
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| ITC13 | 1991 | Copenhagen, Denmark | Teletraffic and datatraffic in a period of change |
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| ITC14 | 1994 | Juan-les-Pins, France | The Fundamental Role of Teletraffic in the Evolution of Telecommunications Networks |
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| ITC15 | 1997 | Washington D.C., USA | Teletraffic Contributions for the Information Age |
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| ITC16 | 1999 | Edinburg, UK | Teletraffic engineering in a competitive world |
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| ITC17 | 2001 | Salvador da Bahia, Brazil
| Teletraffic engineering in the Internet era |
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| ITC18 | 2003 | Berlin, Germany | Providing QoS in Heterogeneous Environments |
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| ITC19 | 2005 | Beijing, China | Performance Challenges for Efficient Next Generation Networks |
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| ITC20 | 2007 | Ottawa, Canada | Managing Traffic Performance In Converged Networks - The Interplay Between Convergent And Divergent Forces |
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| ITC21 | 2009 | Paris, France | Traffic and Performance Issues in Networks of the Future |
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| ITC22 | 2010 | Amsterdam, Netherlands | 22nd International Teletraffic Congress |
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| ITC23 | 2011 | San Francisco, USA
| 23rd International Teletraffic Congress |
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| ITC24 | 2012 | Kracow, Poland | 24th International Teletraffic Congress |
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| ITC25 | 2013 | Shanghai, China | Teletraffic in the Cloud |
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| ITC26 | 2014 | Karlskrona,Sweden | Teletraffic Contributions Towards a Sustainable World |
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| ITC27 | 2015 | Ghent, Belgium | Traffic, Performance and Big Data |
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ITC28 | 2016 | Würzburg,Germany | Digital Connected World |
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