DNS tools help answer practical questions: what record is published, whether an MX record points to mail exchangers, whether SPF, DKIM, and DMARC records appear, and whether DNS answers vary across resolvers.
Free DNS tools for lookup, propagation, MX, SPF, DKIM, DMARC, and domain diagnostics.
Inspect public DNS records and email authentication signals for domains you manage or are authorized to review.
What you can do here
Enter target
Use a public domain, DNS name, URL, or record type.
Confirm scope
Check only domains and systems you may inspect.
Run check
Review DNS, email, SSL, status, or WHOIS signals.
Read details
Use the summary first, then inspect technical rows.
Top tools in this workspace
DNS Lookup
Resolve hostnames to addresses and reverse DNS using standard lookup APIs.
DNS Propagation Checker
Run safe DNS lookups for a domain without external APIs.
Email Deliverability Tester
Review public MX, SPF, DKIM, and DMARC readiness signals for a domain without sending email.
MX Record Checker
Check mail-related DNS information for a domain.
SPF Record Checker
Check SPF-related DNS results for a domain.
DKIM Checker
Check a DKIM selector host with DNS lookup.
DMARC Checker
Check a domain's DMARC TXT record with local DNS lookups only.
WHOIS Lookup
Query WHOIS servers over the standard TCP protocol and show the raw registry response.
My IP Address
Show the visitor client IP using Cloudflare and forwarded proxy headers without using external services.
IP Geolocation Lookup
Resolve IP registry data, reverse DNS, and WHOIS-based location hints fully offline from your own request path.
Ping Tool
Send ICMP pings and measure latency, packet loss, and jitter.
Authorized Port Range Checker
Check a TCP port range on a host you own or are authorized to test.
Related categories
DNS tools FAQ
What can DNS tools check?
They can inspect public DNS answers such as A, AAAA, CNAME, MX, TXT, SPF, DKIM, DMARC, NS, and related domain records where supported.
Why do DNS answers differ?
Resolvers cache records and refresh based on TTL and provider behavior, so recent changes can appear unevenly.
Are DNS results official?
No. Treat them as public diagnostic snapshots and verify critical changes with your DNS provider.