Is it possible to find all the domains that are owned by a particular person using a whois search alone or a script?

The only way I know now is to download the tld zone file from Verisign then write a script to search for particular information in that file.

It is not possible. As I know tld domain zone file at Verisign only contains whois delegation info.

Meaning that when you whois a domain then you will be redirected to delegated whois server at port TCP 43.

Given this, if one registers few domains and each of them with different registerar, you have no way to find out who registered those domains.

The idea of WHOIS is to give info about registrant once you have the domain name. Not the other way around.

:D

Not a practical way.

The Zone files don't have that kind of information.

A typical Zone file record looks like this:

0-3.ORG. 172800 IN NS NS1.GOREGISTERDOMAINS.COM.
0-3.ORG. 172800 IN NS NS2.GOREGISTERDOMAINS.COM.

There is no whois data in the Zone files.

In the distributed whois model, each Registrar's database contains the whois data for the domains under their control.

-t

How large is the zone file?

Is it also possible to update the zone files without downloading the entire thing again? If so how can you obtain simply the list of updates.

:homer: