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DNS Lookup

douban.com

douban.com 18 ms

A Records (IPv4)

81.70.124.99

120.53.130.158

140.143.177.206

MX Records (Mail)

10 mx1.feishu.cn

20 mx2.feishu.cn

30 mx3.feishu.cn

NS Records (Nameservers)

ns3.dnsv4.com

ns4.dnsv4.com

TXT Records

v=spf1 include:feishu-spf.mail.douban.com ~all

_7taq71qhdd4d8aex977o81h07frjhgl

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Other reports for douban.com

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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