go
vpsm.btc.bw has one IP number. bw, co.bw, ac.bw, btc.bw, net.bw and at least five other hosts use this as a nameserver. btc.bw is a domain controlled by five nameservers at btc.bw themselves. Some of them are on the same IP network. Incoming mail for btc.bw is handled by two mailservers also at btc.bw. They are on the same IP network. btc.bw has one IP number , but the reverse is ns1.btc.bw. vpsm.btc.bw is hosted on a server in Botswana.

vpsm.btc.bw
a records
 
+ 168.167.253.21 168.167.0.0/16 AS14988  
+ ---  

btc.bw
a records
 
+ 168.167.168.34 168.167.0.0/16 AS14988 ns1.btc.bw
+ --- ns1.btc.bw
ns-soa records
ns1.btc.bw
+ 168.167.168.34 168.167.0.0/16 AS14988 -
+ --- -
ns records
morula.btc.bw
+ 168.167.65.67 168.167.0.0/16 AS14988 -
+ --- -
ns1.btc.bw
+ 168.167.168.34 168.167.0.0/16 AS14988 -
ns4.btc.bw
+ 168.167.253.20 168.167.0.0/16 AS14988  
+ ---  
vpsm.btc.bw
+ 168.167.253.21 168.167.0.0/16 AS14988  
mogonono.btc.bw
+   AS?  
mx records
morula.btc.bw
+ 168.167.65.67 168.167.0.0/16 AS14988 -
+ --- -
viruscan.btc.bw
+ 168.167.65.6 168.167.0.0/16 AS14988  
+ ---  
ip numbers of host
168.167.253.21
domains using this as nameserver
167.168.in-addr.arpa
199.167.168.in-addr.arpa
37.167.168.in-addr.arpa
ac.bw
btc.bw
btcphonebook.co.bw
bw
co.bw
net.bw
org.bw
used as nameserver but missing in zone
167.168.in-addr.arpa