ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000098)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.000096)
hofstra.edu                    has IPv4  has IPv6  ::  (time=0.000093)
zimbra.com                     has IPv4  has IPv6  ::  (time=0.000101)