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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

Tools/Lookup

WHOIS

Query WHOIS servers directly, following referrals from IANA to the registry and registrar, and see each raw response.

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.