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cas.cn

cas.cn 264 ms

A Records (IPv4)

159.226.242.61

AAAA Records (IPv6)

2400:dd01:1017:1000::9fe2:f23d

MX Records (Mail)

5 mx.cstnet.cn

NS Records (Nameservers)

ns3.cstnet.cn

ns4.cstnet.cn

TXT Records

v=spf1 include:spf.mail.cstnet.cn -all

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Security Headers

CSP, HSTS, X-Frame-Options grade for this site

SSL Certificate Checker

Inspect certificate validity, expiry, cipher suite, and chain — supports SNI.

Redirect Checker

Trace the full HTTP redirect chain, flag loops, and surface mixed-content downgrades.

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