It's probably a troll, but FWIW (and AFAIK):
For this to work from outside of your assigned IP address range (within
which you could mess with your DNS as you wish), you need to have IANA fully
implement gTLD-MoU (of 1998-06-01)¹ and register the top-level domain .web
and your company (or another one) as the accredited registrar for this DNS
zone. Then you can register the second-level domain any.web for you with
yourself (or the other company), and set up your name servers and Web
servers so that they respond to mmm.any.web. Good luck -- you're going to
need it :)
See also: <http://en.wikipedia.org/wiki/Domain_Name_System>
Followups trimmed to ciwam; ci is a hierarchy, sci.* are off-topic.
PointedEars
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¹ <http://www.gtld-mou.org/docs/faq.html#2.1>
--
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee