It's just a concatenation of the octets.
207.172.233.37 = 1100 1010.1010 1100.1110 1001.0010 0101
 ...
                 1100 1010 1010 1100 1110 1001 0010 0101 = 3400329509

~B


Christopher L Merrill wrote:
I didn't think this was a legal URL without a top-level domain:
  http://3400329509/
but it worked in my browser
(the whole URL was http://3400329509/paypal.com/us/cgi-bin/index.php,
the site for a paypal scammer in Indonesia)

pinging 3400329509, much to my suprise, resolved to
  202.172.233.37

nslookup resulted in:
  $ nslookup 3400329509
  Server:  rlghnc-dns-cac-06.nc.rr.com
  Address:  24.25.5.51
*** rlghnc-dns-cac-06.nc.rr.com can't find 3400329509: Non-existent domain

Also, a whois lookup fails...so I'm assuming there is some numeric
decoding applied by the network stack to turn it into an IP address...
anyone know what that decoding is?


--
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Brian A. Henning
strutmasters.com
336.597.2397x238
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