前面写了一篇关于中国第二代18位身份证号码的解释，见：http://spyrise.org/blog/china_cid_18_digits/。

朋友在http://ipodnano.freehostia.com/ 上面写了一个在线生成身份证号码的东西，经过我的建议，他刚才来信通知我，已经改进成带有解析功能。

请大家访问 http://ipodnano.freehostia.com/ ，拿你们自己的身份证号码试试。我试过了，挺好用的。

替自己的spyrise.cn和替朋友的umino.cn更新了DNS，奇怪一直未能正常解析。

直到……我发现了这个：http://www.checkdns.net/quickcheckdomainf.aspx    <-一个很直观地分析DNS解析过程的网页。

我发现，我的错误竟然是：

CheckDNS.NET is asking root servers about authoritative NS for domain
Got DNS list for 'spyrise.cn' from A.DNS.cn or A.DNS.cn
Found NS record: ns2.freehostia.com[66.40.52.58], was resolved to IP address by dns1.freehostia.com
Found NS record: ns1.freehostia.com[66.40.52.75], was resolved to IP address by dns1.freehostia.com
Domain has 2 DNS server(s)

CheckDNS.NET is verifying if NS are alive
Error fetching SOA from ns2.freehostia.com [66.40.52.58]: Connection reset. Probably DNS server is offline.
Error fetching SOA from ns1.freehostia.com [66.40.52.75]: Connection reset. Probably DNS server is offline.
0 server(s) are alive
No DNS servers alive, tests stopped

到freehostia.com上一看，果然……原来DNS的地址是dns1.freehostia.com，不是ns1.freehostia.com。怪我前面从free-space.net转移时，下意识以为DNS服务器理所当然应该是ns开头的。。。傻了，这回。害我等了一周，还害朋友也等了一周。