ecust.edu.cn                   has IPv4  has IPv6  ::1  (time=0.000075)
edu22.info                     has IPv4  has IPv6  ::1  (time=0.000143)
www.uc.cn                      has IPv4  has IPv6  ::  (time=0.000142)
www.ucweb.com                  has IPv4  has IPv6  ::  (time=0.000074)