如果得到 ISP 比较困难，得到 tier-1 归属可行嘛？
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 | 1 Showfom PRO  2 |
 | 2 halczy Dec 1, 2014 1 |
 | 3 sNullp OP 感谢 |
 | 4 ThirdFlame Dec 1, 2014 也可以去 17mon.cn 也很准确 |
 | 5 yinian1992 Dec 1, 2014 via Android APNIC Whois |
 | 6 ChiChou Dec 1, 2014 国外的有 GEOIP2，国内 17mon，都提供了多种语言的 API 接口 |
 | 7 claliu Feb 10, 2015 The LookingGlass by Level(3) http://lookingglass.level3.net/ |
| 8 claliu Feb 11, 2015 PCCW Global Ping and Traceroute http://lookingglass.pccwglobal.com/ |
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