Re: Retrieve an email address of sysadmin only knowing the IP address

As other posted noted the whois server depends on the geographical location-- arin.net handles only American IPs, ripe.net handles europe-asia, etc.

One way os to use the whois proxy at whois.geektools.com. It will determine and query the correct whois server for you.

Another way is to use the hostmaster email address which is present in the SOA record of the reverse domain. e.g. if the IP is 1.2.3.4, query for the SOA record of 3.2.1.in-addr.arpa. You can use Net::DNS to do this.

Comment on Re: Retrieve an email address of sysadmin only knowing the IP address

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Re: Re: Retrieve an email address of sysadmin only knowing the IP address by mischief (Hermit) on Aug 09, 2001 at 21:49 UTC
Using the email address in the SOA is one way of doing it, but bear in mind that the hostmaster is not necessarily the administrator of that netblock. The people who are in charge of the network, especially in large orgnisations, are generally seperate from the people who look after the nameservers.	[reply]