Free Network & Email Tools
Free, fast network and email checks that run on our own infrastructure, nothing you enter is stored. Pick a tool:
🌐 What's my IPSee the public IP address your connection is using right now, its reverse DNS and country.
🔍 DNS lookupQuery any record type (A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA) for a domain.
📧 MX lookupWhich mail servers accept email for a domain, in priority order, with the provider identified.
🛡 SPF checkValidate the SPF record: mechanisms, the 10-lookup limit and the all qualifier.
🔒 DMARC checkIs the domain protected against spoofing? Policy, reporting addresses and alignment.
🔑 DKIM checkFind and validate DKIM signing keys, by selector or by scanning the common ones.
⛔ Blacklist checkIs a mail server IP or domain listed on the major spam blocklists (18 DNSBLs)?
🔐 SSL certificate checkExpiry, issuer, covered names, chain and protocol for any HTTPS host.
📄 HTTP headersResponse headers for a URL with a security-header scorecard (HSTS, CSP, X-Frame-Options...).
↩ Reverse DNSPTR record for an IP and whether it forward-confirms (FCrDNS), a common mail deliverability check.
🔐 Has my password been pwned?Check a password against 900+ million leaked passwords without it ever leaving your browser (k-anonymity: only 5 characters of its hash are sent).
📋 WHOIS lookupRegistrar, key dates, name servers and status for a domain, or the network owner of an IP.
