cugb.edu.cn                    has IPv4  has IPv6  ::1  (time=0.000084)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000100)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.000075)
nilevalley.edu.sd              has IPv4  has IPv6  ::1  (time=0.000076)
pega.com                       has IPv4  has IPv6  ::  (time=0.000100)