cugb.edu.cn                    has IPv4  has IPv6  ::1  (time=0.000090)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000096)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.000090)
pega.com                       has IPv4  has IPv6  ::  (time=0.000091)
zimbra.com                     has IPv4  has IPv6  ::  (time=0.000167)