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DNS Lookup

sina.cn

sina.cn 218 ms

A Records (IPv4)

36.51.224.192

MX Records (Mail)

10 freemx1.sinamail.sina.com.cn

10 freemx3.sinamail.sina.com.cn

10 freemx2.sinamail.sina.com.cn

NS Records (Nameservers)

ns3.sina.com.cn

ns1.sina.com.cn

ns2.sina.com.cn

TXT Records

v=spf1 include:spf.sinamail.sina.com.cn -all

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Other reports for sina.cn

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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