cottonon.com                   has IPv4  has IPv6  ::  (time=0.809914)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000243)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.000219)
nasmedia.co.kr                 has IPv4  has IPv6  ::1  (time=0.000280)