go
e.ext.nic.fr, b.ext.nic.fr, g.ext.nic.fr, d.ext.nic.fr, c.ext.nic.fr and at least six other hosts are subdomains to this hostname. nic.fr is a domain controlled by seven nameservers. Some of them are on the same IP network. Incoming mail for nic.fr is handled by three mailservers at nic.fr themselves. Two mailservers have the same IP number. Some of them are on the same IP network.

nic.fr
ns-soa records
 
+   AS?  
+ ---  
ns records
ns1.ext.nic.fr
+ 193.51.208.13 193.48.0.0/14 AS2200 dns.inria.fr
+ --- dns.inria.fr
ns2.ext.nic.fr
+ 194.2.0.30 194.2.0.0/15 AS3215 ns0.oleane.net
+ --- ns0.oleane.net
ns3.ext.nic.fr
+ 194.2.0.60 194.2.0.0/15 AS3215 ns1.oleane.net
+ --- ns1.oleane.net
ns4.ext.nic.fr
+ 193.0.0.196 193.0.0.0/21 AS3333 ns-sec.ripe.net
+ --- ns-sec.ripe.net
ns2.nic.fr
+ 192.93.0.4 192.93.0.0/24 AS2485 -
+ --- -
ns3.nic.fr
+ 192.134.0.49 192.134.0.0/22 AS2486 -
ns1.nic.fr
+ 192.93.0.1 192.93.0.0/24 AS2485 -
mx records
mx3.nic.fr
+ 192.134.4.11 192.134.4.0/22 AS2485 mx2.nic.fr
+ --- mx2.nic.fr
mx1.nic.fr
+ 192.134.4.10 192.134.4.0/22 AS2485 -
+ --- -
mx2.nic.fr
+ 192.134.4.11 192.134.4.0/22 AS2485 -
subdomains
a.ext.nic.fr
b.ext.nic.fr
c.ext.nic.fr
d.ext.nic.fr
e.ext.nic.fr
f.ext.nic.fr
g.ext.nic.fr
ns1.ext.nic.fr
ns2.ext.nic.fr
ns3.ext.nic.fr
ns4.ext.nic.fr