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TCP/IP DNS Registry Database Lookup Utility (whois/nicname)
(Page 3 of 3)
Third-Party whois Tools
Many operating systems, including
Windows, do not come with a whois command implementation, but
there are third-party programs that will support the function. In recent
years many different organizations have also set up Web sites that implement
the whois function, which is much more convenient and user-friendly
to those more accustomed to graphical operating systems like Windows.
Many of these sites are provided as free services by DNS registrars,
so customers can check if a name they are interested in is already taken,
and if so, by whom.
One drawback of some of these systems
is that they usually do not have the intelligence to check all the different
registries where domain name records are stored. In most cases, a whois
service provided by a registrar will only search for names in the particular
domains (TLDs) in which the registrar
operates. So, if the registrar deals with .COM, .ORG and .NET, it may
only support whois queries for those TLDs. To check the registration
information for domains in more obscure TLDs, such as some of the less
(country code) domains, a considerable
amount of searching may be required.
Key Concept: The TCP/IP whois utility allows registration information to be displayed for a DNS domain, such as its owner, contact information and the date that its registration expires. The program is most commonly found on UNIX operating systems, where it is given intelligence that allows it to automatically query the correct servers to find the information for most domains. Newer Web-based whois utilities also now exist, but are usually limited to displaying information about domains in only a specific subset of top-level domains.
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The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
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