go
sav.sea.dotster.net and inap.sea.dotster.net are subdomains to this hostname. dotster.net is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at dotster.com. They are on different IP networks. dotster.net has two IP numbers. They are on different IP networks.

dotster.net
a records
 
+ 64.85.73.21 64.85.64.0/18 AS3561  
+ ---  
+ 66.150.120.141 66.150.112.0/20 AS10913  
ns-soa records
ns1.dotster.com
+ 66.150.161.146 66.150.160.0/20 AS14744 -
+ --- -
ns records
ns1.dotster.com
+ 66.150.161.146 66.150.160.0/20 AS14744 -
+ --- -
ns2.dotster.com
+ 63.251.83.72 63.251.80.0/20 AS10913 -
subdomains
inap.sea.dotster.net
sav.sea.dotster.net
nameservers missing in zone
ns1.dotster.com
ns2.dotster.com