免费域名dns解析服务

http://www.powerdns.com
dns-eu1.powerdns.net IP1: 213.244.168.217
dns-us1.powerdns.net IP2: 66.96.1.31
dns-eu2.powerdns.net IP3: 213.244.168.247

http://www.mydomain.com/
ns1.mydomain.com    64.94.117.195
ns2.mydomain.com    216.52.121.228
ns3.mydomain.com    66.150.161.130
ns4.mydomain.com    63.251.83.74


http://www.everydns.net/
ns1.everydns.net   64.158.219.3
ns2.everydns.net   216.218.240.206
ns3.everydns.net   80.84.249.169
ns4.everydns.net   63.219.183.200


检查DNS是否更新的地址：
http://www.checkdns.net