cottonon.com                   has IPv4  has IPv6  ::  (time=0.000098)
cugb.edu.cn                    has IPv4  has IPv6  ::1  (time=0.000177)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.000106)
zimbra.org                     has IPv4  has IPv6  ::  (time=0.000107)