<timeline> ImageSize = width:800 height:200 PlotArea = left:65 right:15 bottom:20 top:20 AlignBars = justify Period = from:1997 till:2022 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:1 start:1997
PlotData=
align:center textcolor:black fontsize:10 mark:(line,black) width:25 shift:(0,-5)
bar:CEO from: 1998.830 till: end from: 1998.830 till: 2001.249 text:"Roberts" color:skyblue from: 2001.249 till: 2003.249 text:"Lynn" color:orange from: 2003.249 till: 2009.5 text:"Twomey" color:skyblue from: 2009.5 till: 2012.583 text:"Becktrom" color:orange from: 2012.583 till: 2012.833 shift:(0,15) text:"Atallah*" color:limegreen from: 2012.833 till: 2016.249 text:"Chehade" color:skyblue from: 2016:249 till: 2016.417 shift:(0,15) text:"Atallah*" color:limegreen from: 2016.417 till: end text:"Marby" color:orange
bar:Chairperson from: 1998.830 till: end
from: 1998.830 till: 2001 text:"Dyson" color:drabgreen from: 2001 till: 2008 text:"Cerf" color:lavender from: 2008 till: 2012 text:"Thrush" color:drabgreen from: 2012 till: 2017 text:"Crocker" color:lavender from: 2017 till: 2020 text:"Chalaby" color:drabgreen from: 2020 till: end shift:(0,15) text:"Botterman" color:lavender
bar:Structure from: start till: end color:white from: 1997 till: 1998.830 shift:(18,15) text:"Birth of ICANN" color:tan1 from: 2001.916 till: 2003.166 shift:(10,15) text:"Evo & Reform" color:tan1 from: 2008.249 till: 2012.5 shift:(12,15) text:"GNSO 1 - Houses Formed" color:tan1
bar:Policy from: start till: end color: white
from: 1999.666 till: 2001.249 text:"Ad Hoc" color:coral
</timeline>