What this tool checks
- PTR result
- Hostname resolution
- Mail reputation guidance
DNS and Domain Tools
Reverse DNS Checker
Check PTR records and reverse DNS guidance for public IPs.
Run the check
Enter a public target. Checks are a point-in-time sample; private and internal addresses are blocked.
Why it matters
Reverse DNS is especially important for mail servers and reputation checks.
Plain-English examples
- Check the PTR for a mail server IP
Recommended fixes
- Ask your hosting provider to set PTR records
- Make PTR hostnames match mail infrastructure
Understanding the result
Use findings as a starting point, confirm the intended configuration with your provider, and retest after a change. A successful check does not guarantee security, delivery, uptime or search rankings. Results depend on public DNS and what the server exposes at the time of the check.
Related tools
Run these checks next for a fuller picture.
WHOIS / RDAP Lookup
Look up public registration data, domain status, important dates and nameservers.
Run checkDNS Lookup
Query public DNS records for a domain and explain what is present or missing.
Run checkDNS Propagation Checker
Compare answers from Cloudflare, Google and Quad9 resolvers.
Run checkIP Lookup
Resolve domains to public IP addresses or check reverse DNS for an IP.
Run checkNeed help fixing the result?
