Mr.DNS
DNS Lookup
What is My IP
Network Tools
DNS & IP
DNS Propagation
Check DNS changes across 7 global resolvers
DNSSEC Checker
Verify DNSSEC chain of trust
Whois
Domain and IP registration details
Port Checker
Test if a TCP port is open or closed
Blacklist / RBL Check
Check IPs and domains against 15+ blocklists
Connectivity & Web
Ping
Send ICMP echo requests, measure RTT
Traceroute
Trace network path hop-by-hop
SSL Certificate Check
Inspect certificate details, expiry, and chain
HTTP Headers
Inspect response headers and redirect chain
HTTP/2 & HTTP/3
Check modern protocol support and HSTS
Email Tools
Check & Validate
Email Health Check
Combined SPF + DMARC grade
SPF Checker
Validate & expand SPF records
DKIM Checker
Validate DKIM public keys
DMARC Checker
Validate & diagnose DMARC records
MTA-STS Checker
Validate MTA-STS policy and DNS record
Diagnose & Build
BIMI Checker
Validate BIMI record and logo SVG
Email Header Analyzer
Trace delivery path and auth results
Generators
SPF Generator
Build & publish SPF records
DMARC Generator
Build & publish DMARC records
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DNS Lookup Tools
Look up DNS records for any domain or IP address.
A
AAAA
MX
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CNAME
PTR
CAA
SRV
TLSA
HTTPS
SVCB
MTA-STS
TLS-RPT
BIMI
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