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DNS

DNS lookup
Reverse DNS
DNS propagationSoon
DNS health reportSoon

Website

SSL/TLS checker
HTTP headers
Website healthSoon

Email

SPF, DKIM & DMARC
Email header analyser
MX healthSoon
Blocklist checkSoon

Lookup

RDAP lookup
WHOIS
IP info
What's my IP

Connectivity

PingSoon
TracerouteSoon
MTRSoon
Port checkSoon

Utilities

Subnet calculator

Reverse DNS

Find the hostname behind an IPv4 or IPv6 address and check that it resolves back to the same address (forward-confirmed reverse DNS).

MtrX Tools, MVP 1Probes run from our servers. Private and internal addresses are never contacted.Results are not stored. Recent runs stay in this browser.