cottonon.com                   has IPv4  has IPv6  ::  (time=0.000100)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000124)
hofstra.edu                    has IPv4  has IPv6  ::  (time=0.000103)
zimbra.org                     has IPv4  has IPv6  ::  (time=0.000121)