IP to Hostname — Reverse DNS Lookup, Find Domain from IP
IP to Hostname
Reverse DNS lookup — find hostnames associated with an IP address.
Free online reverse DNS lookup tool. Enter any IPv4 or IPv6 address to find all hostnames associated with it via PTR record queries. Useful for server identification, email server verification, network troubleshooting, and cybersecurity investigations. Returns the primary hostname and all associated PTR records, query time, and full timestamp. Powered by server-side DNS resolution — no data is stored or logged.
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Tags: reverse dns, ptr, hostname, ip, lookup, network
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How to IP to Hostname Online
Enter a valid IPv4 or IPv6 address into the input field.
Press Enter or click "Lookup" to perform a reverse DNS (PTR) query.
View the primary hostname and any other hostnames associated with the IP address.
Copy the result to your clipboard using the Copy button.
IP to Hostname Features
Reverse DNS lookup for both IPv4 and IPv6 addresses
Retrieves multiple PTR records if the IP maps to multiple hostnames
Provides the exact DNS query execution time
100% free with no sign-up required
Server-side queries bypass local DNS caches for accurate results
Frequently Asked Questions
- What is a reverse DNS lookup?
- A reverse DNS lookup (rDNS) is a DNS query that determines the domain name or hostname associated with an IP address, which is the opposite of a forward DNS lookup that determines the IP address associated with a domain name.
- What is a PTR record?
- A Pointer (PTR) record is a type of DNS record that resolves an IP address to a domain or hostname. PTR records are used for reverse DNS lookups and are commonly required for mail servers to verify that the sending server is authorized.
- Why does my IP address not have a hostname?
- Not all IP addresses have a PTR record configured. In such cases, the reverse DNS lookup will return no results. Setting up a PTR record usually requires contacting the ISP or hosting provider that controls the IP address block.
- Is this IP to hostname lookup free?
- Yes, the IP to hostname lookup is completely free and requires no sign-up. You can run as many reverse DNS queries as you need on any public IPv4 or IPv6 address.
- Why is the reverse DNS query performed server-side?
- Browsers cannot perform raw PTR queries directly, so the lookup is issued from the DevFlow server to bypass local DNS caches and return the authoritative hostname records. Only the IP address you queried is sent to our server, and it is not stored or linked to your identity.
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