Reverse IP Lookup
Reverse IP lookup usually means finding the hostname (or other details) for an IP address — the opposite of “domain to IP.” Use the tools below to get the hostname (PTR), ISP, and location for any IP. All free, no signup.
Use Our Reverse IP Tools
Get hostname and full details for any IP.
What Is Reverse IP Lookup?
Normal lookup is “domain → IP.” Reverse IP is the other way: “IP → what do we know about it?” That can mean (1) the hostname assigned to the IP (reverse DNS / PTR), (2) the ISP or organization that owns it, or (3) in some contexts, a list of domains that resolve to that IP. There’s no single “reverse IP” database; different tools answer different parts.
We give you the main pieces for free: use our reverse DNS lookup to get the hostname (PTR) for an IP, and our IP lookup to get country, city, ISP, organization, and VPN/proxy flags. For your own IP, start with What is my IP.
How to Use Reverse IP Lookup
For hostname (PTR): go to Reverse DNS Lookup, enter the IP, and you’ll see the PTR record. For full details (location, ISP, org, reverse DNS): use our IP lookup or IP location finder. For connectivity to that IP, use our ping test or traceroute tool. For domain records (A, MX, etc.), use DNS lookup.
Features
- Reverse DNS (hostname) for any IP
- Full IP lookup: ISP, org, location, map
- Free, no signup, no storage
- Works with IPv4 and IPv6
Why Use This Tool
Server admins use it to confirm a hostname or who owns an IP. Abuse teams use it to find the right ISP to contact. Security teams use it to see if an IP is hosting or VPN. Combine with DNS lookup when debugging domains, or IP blacklist check for email reputation.
FAQs
What is reverse IP lookup?
Reverse IP lookup usually means either (1) finding the hostname for an IP (reverse DNS / PTR) or (2) finding which domains or services point to or use that IP. Our IP lookup and reverse DNS tools cover both.
How do I find domains on an IP?
There is no single public database of “all domains on this IP.” You can use our IP lookup to see the hostname (PTR) and organization; for more you’d need third-party or commercial reverse IP services.
Is reverse IP lookup the same as reverse DNS?
Reverse DNS is one type: IP → hostname (PTR). “Reverse IP” is sometimes used for that, or for “which domains resolve to this IP.” We offer reverse DNS; use our IP lookup for full details.
Can I do reverse IP lookup for free?
Yes. Use our reverse DNS lookup for hostname (PTR) and our IP lookup for geolocation, ISP, and organization. Both are free.
Why would I need reverse IP lookup?
Common uses: finding the hostname of a server, checking shared hosting, abuse reporting, or verifying which organization owns an IP.