go
kista.dns.swip.net, pitea.dns.swip.net, wexio.dns.swip.net, falun.dns.swip.net, ystad.dns.swip.net and at least six other hosts are subdomains to this hostname. swip.net is a domain controlled by four nameservers. All of them are on different IP networks. Incoming mail for swip.net is handled by one mailserver at swip.net themselves. swip.net has one IP number , but the reverse is mail.tele2.se.

swip.net
a records
 
+ 212.247.156.1 212.247.0.0/16 AS1257 mail.tele2.se
+ --- mail.tele2.se
ns-soa records
kista.dns.swip.net
+ 192.71.220.9 192.71.220.0/24 AS1257 -
+ --- -
ns records
kista.dns.swip.net
+ 192.71.220.9 192.71.220.0/24 AS1257 -
+ --- -
kalmar.dns.swip.net
+ 192.71.180.46 192.71.180.0/24 AS1257 -
sunic.sunet.se
+ 192.36.125.2 192.36.125.0/24 AS1653 -
server.nordu.net
+ 193.10.252.19 193.10.252.0/24 AS2603 -
mx records
mailgw.swip.net
+ 212.247.156.1 212.247.0.0/16 AS1257 mail.tele2.se
+ --- mail.tele2.se
subdomains
falun.dns.swip.net
ffalun.dns.swip.net
kalmar.dns.swip.net
karlstad.dns.swip.net
kista.dns.swip.net
malmo.dns.swip.net
malmoe.dns.swip.net
orebro.dns.swip.net
pitea.dns.swip.net
wexio.dns.swip.net
ystad.dns.swip.net