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I tried to look for a good doc on netstat especially for the options -an but cannot find anything detailed enough.

example 1:

tcp 0 126 android.home:58797 par10s34-in-x0e.1e100.net:https ESTABLISHED

what is par10s34-in-x0e.1e100.net? it is not a domain name? nslookup returns: Can't find par10s34-in-x0e.1e100.net: No answer

example 2:

tcp 0 0 2a01:cb1d:192:e100:f167:9ba7:494f:61fa:45634 par21s03-in-x14.1e100.net:https ESTABLISHED

what is 2a01:cb1d:192:e100:f167:9ba7:494f:61fa:45634?

narb
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    Stack Overflow is a site for programming and development questions. This question appears to be off-topic because it is not about programming or development. See [What topics can I ask about here](http://stackoverflow.com/help/on-topic) in the Help Center. Perhaps [Super User](http://superuser.com/) or [Unix & Linux Stack Exchange](http://unix.stackexchange.com/) would be a better place to ask. – jww Nov 02 '17 at 19:43
  • understand. will do. – narb Nov 02 '17 at 19:58
  • @jww I've had a good answer from superuser.com. Thanks! – narb Nov 03 '17 at 04:51

1 Answers1

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2a01:cb1d:192:e100:f167:9ba7:494f:61fa is a IPv6 address.

45634 is a port number.

par10s34-in-x0e is a hostname.

1e100.net is a domain name.

jcamdr
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    why nslookup cannot resolve the hostname or the domain part? How did netstat resolve those names? – narb Nov 03 '17 at 04:26
  • Use 'host' instead of 'nslookup': host par10s34-in-x0e.1e100.net par10s34-in-x0e.1e100.net has IPv6 address 2a00:1450:4007:817::200e Use 'whois' for the domain part: whois 1e100.net – jcamdr Nov 03 '17 at 09:55
  • Because 'host' is nicer than 'nslookup' or 'dig' and query A (IPv4) and AAAA (IPv6) records by default. – jcamdr Nov 03 '17 at 15:12
  • Try 'dig par21s03-in-x14.1e100.net AAAA' or 'nslookup -type=AAAA par21s03-in-x14.1e100.net'. – jcamdr Nov 03 '17 at 15:20