Network & email tools
Diagnose DNS records, mail authentication (SPF, DKIM, DMARC), TLS certificates, and more.
RDAP / WHOIS
Domain registration data
WHOIS Lookup
Registration contacts and dates
DNS Inspector
A, AAAA, MX, TXT, NS, CNAME
MX Lookup
Mail exchangers
TXT Lookup
All TXT records
SPF Checker
Sender policy framework
DKIM Lookup
Selector TXT record
DMARC Checker
_dmarc policy
IP Lookup
Geo & reverse DNS
SSL Checker
Certificate & expiry
Blacklist (RBL)
IPv4 RBL scan