for loop? grep for @ or whatever specific contact text you're looking for.

$ for i in `cat domains.txt` ; do whois $i | grep '@' ; done
        Please contact contact-admin@google.com 1600 Amphitheatre Parkway
        dns-admin@google.com +1.6502530000 Fax: +1.6506188571
        dns-admin@google.com +1.6506234000 Fax: +1.6506188571
        dns-admin@google.com +1.6503300100 Fax: +1.6506181499
        Please contact gmail-abuse@google.com 1600 Amphitheatre Parkway
        gmail-abuse@google.com +1.6502530000 Fax: +1.6506188571
        dns-admin@google.com +1.6502530000 Fax: +1.6506188571
        dns-admin@google.com +1.6502530000 Fax: +1.6506188571

$ cat domains.txt
google.com
gmail.com


On Tue, Sep 4, 2012 at 1:58 AM, Jim March <1.jim.march@gmail.com> wrote:
> ...possibly at the Linux command line?
>
> I need to know which websites share the same hosts and/or technical contact
> names/phone numbers.  Basically I've got a line on some "bad guys" doing
> various websites and putting their own names in the whois data.  I need to
> find out how many other sites are involved.
>
> Thanks!
>
> Jim
>
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