cugb.edu.cn                    has IPv4  has IPv6  ::1  (time=0.000097)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000100)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.000097)
zimbra.com                     has IPv4  has IPv6  ::  (time=0.000092)
zimbra.org                     has IPv4  has IPv6  ::  (time=0.000093)