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PHP

Using PHP classes to navigate distributed whois databases
By: Mark Jeftovic
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    1999-12-07

    Table of Contents:
  • Using PHP classes to navigate distributed whois databases
  • Overview of the whois landscape
  • Making sense of it with PHP classes
  • Overview of Whois2.php
  • Looking at the pieces
  • Tying it all together
  • Conclusion

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    Using PHP classes to navigate distributed whois databases - Overview of the whois landscape


    (Page 2 of 7 )


    Excepting for the moment .com/.net/.org, most TLD's have a whoisserver somewhere listening on port 43 where you can connect toit, give it a domain name, and get a record back for that domainname if it exists. The formats of the returned record vary acrossdifferent servers.

    The .com/.net/.org namespace is a little more convoluted. We have thecentral registry database at whois.nsiregistry.net which contains aminimal record for all domains in this namespace, and then eachregistrar operates it's own whois server with more complete recordsfor only the domains they administer. Further, each registrar has it'sown whois output format for their own records.

    The result of all this is One Big Mess. Depending on whether you wantto look up a ccTLD or a gTLD (generic TLD), and if the latter, whothe registrar is and where their whois server is; trying to createa script to integrate this kind of functionality into your websitecan be, in a word, nightmarish.

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