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Reverse DNS (rDNS) lookup is the reverse of the standard thing "forward DNS lookup". It shows where the DNS is queried for the IP address of a certain hostname. In reverse DNS, the DNS is queried for the hostname of a certain IP address. A reverse DNS lookup returns the hostname of an IP address.
It's an online tool. This tool does a reverse lookup of IP address to rapidly show every other domain hosted from the same server. Useful for discovering phishing sites or identifying other sites on the same shared facilitating server. All the data is found through search engine queries. It’s to get all the domain names that have the same IP addresses. This is fundamental since a great numerous people use shared encouraging which is very affordable because all websites share the same dedicated server with one IP address. If you enter a domain name or an IP address, it’ll give you all the domain names that share the same IP address.
Enter an IP address on the box and click “Check”. And it will show you all of the domains currently hosted there instantly.