DNS Lookup

r-project.org

r-project.org 28 ms

A Records (IPv4)

137.208.57.37

MX Records (Mail)

0 rproject-org0c.mail.protection.outlook.com

NS Records (Nameservers)

ns3.urbanek.info

ns1.wu-wien.ac.at

ns2.urbanek.info

ns2.wu-wien.ac.at

ns1.urbanek.info

TXT Records

MS=ms32736572

v=spf1 ip4:137.208.3.21 ip4:137.208.8.13 ip4:137.208.8.17 ip4:137.208.3.22 ip4:129.132.119.208 ip4:169.60.149.197 ip4:169.62.197.242 ip6:2607:f0d0:2701:195::7 ~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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