cugb.edu.cn                    has IPv4  has IPv6  ::1  (time=0.000081)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000357)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.015947)
univ-tlemcen.dz                has IPv4  has IPv6  ::1  (time=0.000252)