domain name lookup
In the traditional sense, it is the process of converting a numeric IP address into a text name (for example, 184.108.40.206 is converted to www.netlingo.com).
In common usage, to do a "domain name lookup" refers to finding out whether a particular domain name is available for use. One place to find out whether a domain name is available is the link below. If you want to find out who owns a particular domain name, then use the "WHOIS" (pronounced who-is) link.
NetLingo Classification: Net Technology
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