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Reverse IP Lookup
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Free reverse IP lookup tool to find all domains hosted on a single IP address. Check DNS resolution history for IPv4 and IPv6 addresses instantly.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
Enter an IP address to request the domains associated with it in the service’s returned records. Results are shown in pages and can include a total count, the current page and a page size, plus each listed domain’s first and last recorded dates. Those dates describe the returned record fields; they do not establish a complete history for every domain on the internet.
“Reverse IP lookup” is often used broadly. DNS reverse resolution uses a PTR record to map an address to a hostname. A domain-associated-with-IP search asks which domain names appear against an address in a dataset. RFC 1035 describes DNS record and query behavior, including PTR; this page’s list should not be treated as a PTR answer or a guarantee that every hosted site is present.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Enter a syntactically valid IPv4 or IPv6 address in the IP field. The query does not accept a domain name in that field.
Submit the lookup and review the returned IP, total-record count, page number and page count.
Inspect the domain names and their displayed first and last dates. Use the previous and next controls when more than one page is available.
For a classic reverse DNS check, use a DNS client or resolver that queries the address’s PTR record. For a broader association search, compare this list with other evidence and record when you ran the lookup.
Use cases
See how the tool fits into real work and everyday tasks.
A site operator can inspect returned names associated with an address they manage, then compare the results with their hosting account or DNS records.
An authorized analyst can use the list as one lead when assessing a suspicious address, then verify relevant domains with authoritative DNS and other reliable records.
Q&A
Find concise answers to common questions and confusing cases.
Not necessarily. This lookup returns domain records associated with an IP address. A PTR query is a specific DNS operation and may return a hostname or no record.
The result only reflects records returned by the lookup service. A missing name does not prove it never used the address, and a listed name should be independently checked before drawing conclusions.
They are date fields attached to each returned record. Treat them as the service’s recorded observations, not proof of the exact start or end of hosting.
Notes
Review scope, result limitations, and important precautions before use.
Shared hosting, content delivery networks and changing DNS can associate many domains with one address. Lists can be incomplete or reflect records at different times. Do not infer common ownership, malicious activity or current hosting from an IP association alone; verify through sources appropriate to your investigation.
Related
Discover related tools, collections, and available API capabilities.