Free Reverse DNS Lookup
Find the hostname (PTR record) associated with any IPv4 or IPv6 address.
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What is Reverse DNS (rDNS)?
A standard DNS lookup turns a domain name into an IP address. Reverse DNS does the opposite — it turns an IP address back into a hostname using a PTR (pointer) record.
Why does reverse DNS matter?
- Email deliverability: Mail servers check the sending IP's PTR record. A missing or mismatched PTR is a common reason legitimate email lands in spam.
- Logging & diagnostics: Server logs are far easier to read when IPs resolve to friendly hostnames.
- Trust & verification: Reverse DNS helps confirm that an IP belongs to who it claims to.
If you run a mail server on a VPS or dedicated server, set a PTR record that matches your hostname. Volt Serv configures reverse DNS for all server customers on request.