If I know the Registrant (i.e., the *individual* who registered it) of
an Internet domain, how can I use this information to find all other
domains registered to the same person and/or using the same
information?

The information I'm interested is the data entered in the Registrant,
Administrative and Contact portion of a domain registration record. 
This would include things like first and last name, home address,
telephone and email address.  Note: the Registrar and Name Server
fields are not what I need to
search on.

Please supply examples of the search syntaxes I need, and a free URL
where I can perform these specific types of searches.

Thanks for your assistance.

- Doug

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Request for Question Clarification by pafalafa-ga on 02 Feb 2006 07:08 PST

Doug,

I don't think there is any database publicly available that allows for
a full text search on whois.

The closest you can get is the Dialog whois search function at:


http://openaccess.dialog.com/ip/forms/PTCDomainNames.html



which allows for searches on owner names.


There is no charge for searching, but they will charge you to pull up
the full whois record (but you can always get it elsewhere, at no
cost).


I haven't found the [ Owner ] search to be particularly comprehensive
in the past, but give it a try, and let me know if it meets your
needs.


pafalafa-ga

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Request for Question Clarification by pafalafa-ga on 05 Feb 2006 17:38 PST

Doug,

Just checking in...

Did you give Dialog a try?  I'd be curious to know what you think.


paf

Hi

You can check below URLS
http://www.internic.net/whois.html
AND
http://www.dnsstuff.com/
And fill it up with Domain Name (eg-yourdomain.com)you can get all the
details of the Domain name like
Registrant:
Administrative Contact:
Technical Contact: 
Billing Contact:
Creation Date: 
Expiration Date: 
Status:( of the website.active or loclked)
Below you can find details of www.xsiha.com 

Thanks and Regards
Manoj Mathew

The exact system you're looking for exist.  The term is called
"Reverse Whois".  Instead of having a domain and finding ownership
info.  You start with a piece of ownership and find domain or domains
that the particular owner is connected to.

The best and most up to date reverse whois is run by a company called
MarkMonitor.com.  Many large lawfirms and brandholders use it to track
down domain squatters and the like.

Probably the most direct URL: http://www.markmonitor.com/solutions/brandprotection/

-cb