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有瀏覽器的話：
在瀏覽器中打開以下任一網址即可。
http://nstool.netease.com/
www.ip138.com
http://www.ipip.net/ip.html
https://api.b.qianxin.com/api/ip
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windows:
tracert www.google.com
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Linux
curl ifconfig.me
curl ifconfig.io
curl httpbin.org/ip
curl http://members.3322.org/dyndns/getip
curl myip.ipip.net