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Reverse WHOIS Lookup with API – List Domains Owned By a Single Owner

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WHOIS works by providing the public with information about any given website. To access this information, you only need to know the websites domain name. There, however, arises a situation where you only know the name of a site or its owner and not the actual domain name.

Reverse WHOIS lookup with API makes it possible to check the domain name associated with the particular name. But how does it work and what other information can reverse WHOIS lookup API reveal?

Confirming a website domain

Armed with just a name, the reverse WHOIS lookup with API can help you identify the associated domain name. However, given the commonality of names, the sheer number of domain names registered by individuals sharing a particular name can prove overwhelming. Instead of using the name in engineering a reverse WHOIS lookup, you are advised to consider settling for something more unique like a phone number or street address.

To a large extent, you can use almost any item used by the website owner to register a domain when conducting a reverse WHOIS lookup with API given that most of this information is readily available on the public registry database.

Confirming the number of domains registered by one person

In other instances, you might have a name, contact address or a single domain name and would like to identify all other domains associated with the address or the site at hand. When you search the WHOIS registry for domains associated with a particular name, it provides you with a list of all website URLs featuring the address. On the other hand, identifying websites with a single owner when you already have one domain name may take two approaches.

The most ideal starts with looking up the contact details of the registrar and conducting an API powered reverse lookup of their address, phone number, or name. Alternatively, you can search the server hosting the domain at hand. In most cases, individuals with multiple domains prefer hosting them under one roof, on a single server, primarily due to its affordability. It is, however, tricky to correctly identify all the domains associated with a single by conducting a server sweep given that it is not dedicated to a single individual or institution use.

Who can use the reverse WHOIS lookup with API?

The fact that the service is readily available and free of charge implies that virtually anyone interested in learning more about the registrar of a specific domain name can use the reverse WHOIS lookup service with API. However, the service has proven more relevant to government security agencies and cybersecurity experts.

The law enforcement units constantly refer to the reverse WHOIS service to match names with their associated domain names in the fight against cybercrime and terrorism. It especially comes in handy in tracking down all the domain names associated with a website that they may consider a threat to relative peace. Cybersecurity experts on the other hand constantly monitor the domain registration scene to identify fraudsters impersonating the brands they represent by tweaking the domain name.

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