Check Tools
Audit a domain end to end: SPF, DKIM, DMARC, DNSSEC, MX, CAA, HTTPS and security headers, plus DNS, WHOIS and reverse IP lookups.
5 tools
DNS Lookup
Find A, AAAA, CNAME, MX, NS, TXT and SOA DNS records for a host.
OpenDomain Health Report
Audit a whole domain in one query: DNS, SPF, DKIM, DMARC, DNSSEC, CAA, HTTPS and security headers, with a prioritised list of what to fix.
OpenEmail Auth Checker (SPF, DKIM, DMARC)
Audit a domain's SPF, DKIM and DMARC records and get a graded report with fixes to stop email spoofing.
OpenWHOIS Lookup
Look up a domain's registration data (registrar, creation and expiry dates, name servers and status) straight over the WHOIS protocol.
OpenReverse IP Lookup
Free reverse IP lookup: enter an IPv4 or IPv6 address and get its reverse DNS hostname (PTR record). Learn why it will not list every domain on an IP, and how to read the result.
Open