Sorry, the RFCs for DNS only allow for the reverse lookup of the Primary name for an IP. Unless you have access to the server's records flat database files, you can't lookup anything else. Even though www.perlmonks.org maps to 66.39.54.27 (and 209.197.123.153), 66.39.54.27 maps back to ads.perlmonks.org. Unless I have access to the perlmonks.org zone file, I don't know that it also maps back to www.perlmonks.org. The same holds true for the perlmonks.com and perlmonks.net zone files. Finally, if I own the xyz.info domain, I can assign pm.xyz.info to 66.39.54.27 without needing (technically, not ethically) permission from The Monastery.

Basically, what I'm saying is that there is no way (unless you want to try every single possible permutation of every top-level domain and do a query to see if it returns your IP#, there is no way to determine every name that will correspond to a specific IP#.

- - arden.
p.s. this thread has nothing to do with perl and a bit to do with DNS.

In reply to Re: Get all aliases of a DNS by arden
in thread Get all aliases of a DNS by gmishra

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