Reverse IP Lookup, Find Hosts Sharing an IP | alltools.in

What is a Reverse IP Lookup? The technique known as Reverse IP Lookup is a way to identify hostnames that have DNS (A) records associated with an IP address. A web server can be configured to serve multiple virtual hosts from a single IP address. This is a common technique in shared hosting environments. It is also common in many organizations and can be an excellent way to expand the attack surface during reconnaissance of a web server. If for example, your primary target web site appears to be secure, you may be able to gain access to the underlying operating system by attacking a less secure site on the same server. Potentially bypassing the security controls of the target site. CIDR Search Not only can you use the Reverse IP lookup to find web hosts on a single IP address, the query can also be performed against a CIDR network block. Search host records pointing to an IP network block (max /24). Free users are limited by the number of results. Registered members can get up to 500'000 results from a single query using the web form or 10 million using the API (see details below).

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