cottonon.com                   has IPv4  has IPv6  ::  (time=0.000140)
ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000247)
hofstra.edu                    has IPv4  has IPv6  ::  (time=0.000117)
pega.com                       has IPv4  has IPv6  ::  (time=0.000180)