cottonon.com has IPv4 has IPv6 :: (time=0.000194) ecust.edu.cn has IPv4 has IPv6 ::1 (time=0.000145) edu22.info has IPv4 has IPv6 ::1 (time=0.000145) hofstra.edu has IPv4 has IPv6 :: (time=0.000241) pega.com has IPv4 has IPv6 :: (time=0.000208)