go
www.s1.fr has one IP number , which is the same as for s1.fr, but the reverse is ns0.tgv.net. postmaster.s1.fr cnames to this hostname. x1.fr, m1.fr, s1.fr, tgv.net, www.x1.fr and at least four other hosts point to the same IP. s1.fr is a domain controlled by two nameservers at tgv.net. They are on different IP networks. Incoming mail for s1.fr is handled by one mailserver at s1.fr themselves. www.s1.fr is hosted on a server in France.

www.s1.fr
a records
 
+ 80.65.232.20 80.65.224.0/20 AS13193 ns0.tgv.net
+ --- ns0.tgv.net

*.s1.fr
a records
 
+ 80.65.232.20 80.65.224.0/20 AS13193 ns0.tgv.net
+ --- ns0.tgv.net

s1.fr
a records
 
+ 80.65.232.20 80.65.224.0/20 AS13193 ns0.tgv.net
+ --- ns0.tgv.net
ns-soa records
ns0.tgv.net
+ 80.65.232.20 80.65.224.0/20 AS13193 -
+ --- -
ns records
ns0.tgv.net
+ 80.65.232.20 80.65.224.0/20 AS13193 -
+ --- -
ns1.tgv.net
+ 83.243.20.50 83.243.16.0/21 AS31216 -
mx records
mail.s1.fr
+ 80.65.232.20 80.65.224.0/20 AS13193 ns0.tgv.net
+ --- ns0.tgv.net
ip numbers of host
80.65.232.20
ptrs of ip numbers
ns0.tgv.net
hostnames sharing ip with a-records
*.m1.fr
m1.fr
mail.s1.fr
ns0.tgv.net
postmaster.m1.fr
s1.fr
tgv.net
www.m1.fr
www.x1.fr
x1.fr
hostnames pointing here by cname
*.s1.fr
postmaster.s1.fr
domains using this as nameserver under another name
20.243.83.in-addr.arpa
232.65.80.in-addr.arpa
francexpress.com
grosbill.com
infiniland.net
lehall.com
oriolis.fr
pc-look.com
phl.fr
t112.tgv.net
tgv.net
witbebenchmark35.com
x1.fr
domains using this as mailserver under another name
s1.fr