Free DNS Tools – DNS Lookup, Propagation, Reverse DNS & Health Check
Free DNS tools to check records, propagation, and domain health in seconds.
- Lookup A, AAAA, MX, TXT, CNAME, NS records
- Check DNS propagation across public resolvers
- Validate reverse DNS (PTR) and FCrDNS
- Audit DNS health and common misconfigurations
Free tools · No signup required · Fast results
DNS Lookup Tool · DNS Propagation Checker · Reverse DNS Lookup · DNS Health Check · WHOIS Lookup
Available DNS Tools
WHOIS Lookup
Look up domain registration information and WHOIS records.
DNS Lookup
Query DNS records (A, AAAA, MX, TXT, CNAME, NS) for any domain.
DNS Health Check
Check DNS configuration health and verify essential records.
Reverse DNS Lookup
Look up PTR records for an IP and validate forward-confirmed reverse DNS (FCrDNS).
DNS Propagation Checker
Check DNS propagation worldwide for A, AAAA, MX, TXT, and CNAME records.
IP Lookup
Find IP location, ASN/ISP, and reverse DNS (PTR) details.
Learn more about DNS
What Are DNS Tools?
- View A, AAAA, MX, TXT, CNAME, NS and other record types
- Check whether DNS changes have propagated
- Verify reverse DNS (PTR) for an IP
- Audit domain health and spot misconfigurations
- Look up WHOIS and registration details
When Should You Check DNS Records?
- Point a new domain to your host or change nameservers
- Migrate a site or email to a new provider
- Configure or troubleshoot email (SPF, DKIM, DMARC)
- See "domain not found" or connection errors
- Confirm propagation after an update
- Verify reverse DNS for a mail server or dedicated IP
Types of DNS Checks Explained
- DNS Lookup – Query A, AAAA, MX, TXT, CNAME, NS, SOA, CAA.
- DNS Propagation – Compare how public resolvers (e.g. Cloudflare, Google) resolve your domain.
- Reverse DNS – PTR records and forward-confirmed reverse DNS (FCrDNS).
- DNS Health Check – Audit for missing/conflicting records and nameserver consistency.
- WHOIS Lookup – Registration, expiry, registrar, and nameservers.
Frequently Asked Questions
Common DNS questions
How long does DNS propagation take?
Usually a few minutes to 24–48 hours; sometimes up to 72 hours. It depends on TTL and how quickly caches expire. Lower TTL before changes can speed it up.
What is reverse DNS?
Reverse DNS (rDNS) maps an IP to a hostname via PTR records. Used for email validation and debugging. FCrDNS means the PTR hostname resolves back to the same IP. Learn more: Reverse DNS Lookup
What is a DNS A record?
An A record points a domain or subdomain to an IPv4 address. Resolvers use it to find your server. AAAA records do the same for IPv6.
Why is my domain not resolving?
Common causes: nameservers not updated, wrong A/AAAA records, propagation delay, or DNS downtime. DNS Lookup Tool and DNS Propagation Checker show what resolvers return. Learn more: DNS Health Check
What does TTL mean in DNS?
TTL (time-to-live) is how many seconds a DNS response can be cached. Lower TTL = faster propagation after changes; higher TTL = less load but slower updates.
How do I check SPF or DMARC records?
They live in TXT records. Use the DNS Lookup Tool for TXT (and _dmarc.yourdomain.com for DMARC). Learn more: SPF Checker and DMARC Checker under Email.