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More free tools for network administrators, system engineers, cybersecurity professionals, and IT support.
Lookup A, AAAA, MX, TXT, NS, SOA, CNAME and PTR records.
View domain registration, registrar and expiration details.
Check certificate validity, issuer and expiration dates.
Analyze SPF, DKIM, DMARC and mail routing.
Check whether an IP address appears on major DNS blacklists.
Calculate subnet masks, broadcast addresses and usable hosts.
Your public IP address is the address assigned to your internet connection. Websites and online services use it to communicate with your device.