DNS
A Lookup
Resolve IPv4 addresses
Open tool →DIAGNOSTIC TOOL DIRECTORY
All Network Tools
Explore domain, email and network diagnostic utilities.
DNS
AAAA Lookup
Resolve IPv6 addresses
Open tool →DNS
CNAME Lookup
Canonical hostname records
Open tool →DNS
DNS Lookup
Review common DNS records
Open tool →Email
MX Lookup
Find mail exchangers
Open tool →DNS
NS Lookup
Name server records
Open tool →DNS
SOA Lookup
Start of authority
Open tool →DNS
TXT Lookup
Text records
Open tool →DNS
Reverse DNS / PTR
Find reverse DNS records
Open tool →DNS
CAA Lookup
Certificate authority authorization
Open tool →DNS
DNSSEC DNSKEY
Inspect DNSKEY records
Open tool →Email
SPF Lookup
Find SPF policies
Open tool →Email
DKIM Lookup
Search common selectors or specify one
Open tool →Email
DMARC Lookup
Find DMARC policies
Open tool →Email
BIMI Lookup
Find BIMI record
Open tool →Email
MTA-STS Lookup
Inspect MTA-STS record and endpoint
Open tool →Email
TLSRPT Lookup
Find TLS reporting record
Open tool →Email
SMTP Banner
Check mail server greeting
Open tool →Email
Blacklist Check
Check selected DNSBL zones
Open tool →Network
HTTP Check
Check HTTP response
Open tool →Network
HTTPS Check
Check HTTPS response
Open tool →Network
Ping
ICMP reachability
Open tool →Network
TCP Port Check
Check allowed TCP ports
Open tool →Network
Traceroute
Inspect route hops
Open tool →Network
WHOIS / RDAP
Registration data via RDAP
Open tool →Network
IP RDAP
IP block registration
Open tool →Network
ASN / IP Info
IP allocation information (not origin ASN)
Open tool →Email
Domain Health
Basic email and DNS health checks
Open tool →DNS
DANE / TLSA Lookup
Discover TLSA records
Open tool →DNS
DNS TTL Analyzer
Inspect record TTLs
Open tool →Email
SPF Lookup Counter
Count direct DNS mechanisms
Open tool →Email
DMARC Policy Analyzer
Inspect DMARC policy tags
Open tool →Security
HSTS Checker
Inspect HSTS response header
Open tool →Security
Security Headers
Review common security headers
Open tool →Security
CSP Header
Inspect content security policy
Open tool →Security
TLS Certificate Trust
Check HTTPS certificate verification
Open tool →Website
Redirect First Hop
Inspect HTTP redirect destination
Open tool →Website
HTTPS Response Time
Measure one HEAD request
Open tool →Website
Compression Headers
Inspect content encoding
Open tool →Website
HTTPS Reachability
Basic HTTPS response check
Open tool →Website
Robots.txt Availability
Check robots.txt status
Open tool →Website
Sitemap Availability
Check sitemap.xml status
Open tool →Some tools provide basic lookups, not full protocol validation. ASN currently provides IP allocation data, not live BGP origin ASN.