go
mg00.drive.ne.jp has one IP number , which also has a corresponding reverse pointer. mg.otweb.jp and mg.drive.ne.jp point to the same IP. drive.ne.jp is a domain controlled by two nameservers at drive.ne.jp themselves. They are on different IP networks. Incoming mail for drive.ne.jp is handled by one mailserver having a total of two IP numbers. They are on different IP networks. drive.ne.jp has one IP number. mg00.drive.ne.jp is hosted on a server in Japan.

mg00.drive.ne.jp
a records
 
+ 202.152.209.9 202.152.208.0/21 AS17697 -
+ --- -

drive.ne.jp
a records
 
+ 202.152.209.31 202.152.208.0/21 AS17697  
+ ---  
ns-soa records
ns00.drive.ne.jp
+ 202.152.209.13 202.152.208.0/21 AS17697 -
+ --- -
ns records
ns00.drive.ne.jp
+ 202.152.209.13 202.152.208.0/21 AS17697 -
+ --- -
ns01.drive.ne.jp
+ 61.204.245.113 61.204.128.0/17 AS4716 -
mx records
mg.drive.ne.jp
+ 61.204.245.109 61.204.128.0/17 AS4716 mg01.drive.ne.jp
+ --- mg01.drive.ne.jp
+ 202.152.209.9 202.152.208.0/21 AS17697 mg00.drive.ne.jp
+ --- mg00.drive.ne.jp
ip numbers of host
202.152.209.9
ptrs of ip numbers
mg00.drive.ne.jp
ip numbers using ptr to this host
202.152.209.9
hostnames sharing ip with a-records
mg.drive.ne.jp
mg.otweb.jp
domains using this as mailserver under another name
1010banchi.co.jp
4860.jp
adnlab.net
angel-bbs.com
awazon.net
bitwallet.co.jp
blue-ribbon1.com
c-point.co.jp
cafe.co.jp
chat-noir.net
clipjoint-j.com
clog.jp
do-house.net
drive.ne.jp
e-taneya.net
entetsu.net
fesol.net
fs-game.com
fumino.net
fushigi.net
goshi.org
hibeck.com
hidamari.net
himecco.com
housing-kobayashi.com
iiyo.net
ikedashoten.co.jp
isenokuni.net
j-line.net
jas.st
kairaku.net
keiyuukai.net
kinomoto.org
kokusai-world.com
kumeline.com
kyukyoku.net
laguna-garden.jp
masuken.net
mie-lab.com
my-f.com
nextone.net
nihonjido-sp.co.jp
nsv-re.com
numbers.ne.jp
officem2.net
orderhikarihealth.com
ptpcom.net
s-akai.com
shizen.ne.jp
shochu.net
style9.jp
sugimotokasei.com
sugiura.net
ukism.net
urabon.st
utida.net
ves.bz
w39.net
was-jp.net
yado489.net
yumeya.net
yuyuraku.net