Host command reverse result

Question

For example I do in Linux using host command:

host yy.yyy.yy.y

Result:

Host z.zzz.zz.z.in-addr.arpa. not found: 3(NXDOMAIN)

Then I repeat host command in a reverse with z.zzz.zz.z than I got a result of pastyy.yyy.yy.y:

Host z.zzz.zz.z

Result:

Host yy.yyy.yy.y.in-addr.arpa. not found: 3(NXDOMAIN)

What is occured and why is that result?

When I try got a WHOIS address of z.zzz.zz.z and yy.yyy.yy.y I got for example:

  yy.yyy.yy.y --> KOREA NIC
  z.zzz.zz.z --> JAPAN NIC

A result via WHOIS is on properly address, but when I use host command it result same.

For others who not understand my question look at this:

xx@yy:$ host 61.206.19.1
Host 1.19.206.61.in-addr.arpa. not found: 3(NXDOMAIN)
xx@yy:$ host 1.19.206.61
Host 61.206.19.1.in-addr.arpa. not found: 3(NXDOMAIN)  <--- Why 61.206.19.1 ? WHOIS don't respond this IP

Your question is utterly unclear. Use the real IP addresses in your question. — Dennis Kaarsemaker, Aug 11 '13 at 17:18
Are you on IP a.b.c.d and are you trying d.c.b.a.in-addr.arpa? (Note the reversed sequence in abcd and dcba) — Hennes, Aug 11 '13 at 18:01

score 0 · Accepted Answer · answered Aug 11 '13 at 19:04

0

I also don't understand your question fully, but:

If you want to perform a reverse lookup e.g. of 1.2.3.4 using the host command you simply type

host 1.2.3.4

That's it. You don't need to use anything in-addr.arpa or invert the bytes when using the host command in order to perform a reverse lookup.

answered Aug 11 '13 at 19:04

Marki

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Look at question. I've edited. – Marin Sagovac Aug 11 '13 at 20:24
Read my answer again. I believe it perfectly explains what you want to know. Maybe you should also read some docs: http://en.wikipedia.org/wiki/Reverse_DNS_lookup#IPv4_reverse_resolution – Marki Aug 11 '13 at 21:00
Sorry, it's reversed. I have bad day sorry! I know know. Solved. – Marin Sagovac Aug 11 '13 at 22:56

Host command reverse result

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