cottonon.com                   has IPv4  has IPv6  ::  (time=0.000214)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000150)
pega.com                       has IPv4  has IPv6  ::  (time=0.000097)
univ-mosta.dz                  has IPv4  has IPv6  ::1  (time=0.000108)