-------------------- MX 값 조회 --------------------
C:Documents and Settings이민우>nslookup
Default Server:  kns.kornet.net
Address:  168.126.63.1

> set ty=mx
> elentec.co.kr
Server:  kns.kornet.net
Address:  168.126.63.1

Non-authoritative answer:
elentec.co.kr   MX preference = 10, mail exchanger = mail.elentec.co.kr

elentec.co.kr   nameserver = ns2.lowhigh.net
mail.elentec.co.kr      internet address = 112.168.30.47
ns2.lowhigh.net internet address = 218.234.17.9
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-------------------- SPF 조회 --------------------
C:Documents and Settings이민우>nslookup
Default Server:  kns.kornet.net
Address:  168.126.63.1

> set ty=txt
> elentec.co.kr
Server:  kns.kornet.net
Address:  168.126.63.1

Non-authoritative answer:
elentec.co.kr   text =

        "v=spf1 ip4:112.168.30.47 ~all"

elentec.co.kr   nameserver = ns2.lowhigh.net
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-------------------- 리버스 조회 1 --------------------
1. 없는 경우
C:Documents and Settings이민우>nslookup
Default Server:  kns.kornet.net
Address:  168.126.63.1

> set ty=soa
> 47.30.168.112.in-addr.arpa
Server:  kns.kornet.net
Address:  168.126.63.1

*** kns.kornet.net can't find 47.30.168.112.in-addr.arpa: Non-existent domain

2. 있는 경우
C:Documents and Settings이민우>nslookup
Default Server:  kns.kornet.net
Address:  168.126.63.1

> set ty=soa
> 221.14.110.in-addr.arpa
Server:  kns.kornet.net
Address:  168.126.63.1

Non-authoritative answer:
221.14.110.in-addr.arpa
        primary name server = nsm.hananet.net
        responsible mail addr = dnsmaster.hanaro.com
        serial  = 2009062522
        refresh = 86400 (1 day)
        retry   = 3600 (1 hour)
        expire  = 3600000 (41 days 16 hours)
        default TTL = 86400 (1 day)

221.14.110.in-addr.arpa nameserver = ins1.hananet.net
221.14.110.in-addr.arpa nameserver = ins2.hananet.net
ins1.hananet.net        internet address = 210.180.98.86
ins2.hananet.net        internet address = 221.139.108.196
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-------------------- 리버스 조회 2 --------------------
1. 없는 경우

C:Documents and Settings이민우>nslookup -qa=ptr 112.168.30.47
Server:  kns.kornet.net
Address:  168.126.63.1

*** kns.kornet.net can't find 47.30.168.112.in-addr.arpa.: Non-existent domain

2. 있는 경우
C:Documents and Settings이민우>nslookup -qa=ptr 110.14.221.34
Server:  kns.kornet.net
Address:  168.126.63.1

Non-authoritative answer:
34.221.14.110.in-addr.arpa      name = mail.jiran.com

221.14.110.in-addr.arpa nameserver = ins2.hananet.net
221.14.110.in-addr.arpa nameserver = ins1.hananet.net
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-------------------- 리버스 조회 3 --------------------
C:Documents and Settings이민우>host 220.72.8.18
18.8.72.220.in-addr.arpa domain name pointer imssmail.samyang.com.

C:Documents and Settings이민우>host imssmail.samyang.com
imssmail.samyang.com has address 220.72.8.145
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