Summary
mascom.co.bw is delegated to three nameservers, however all three delegated nameservers are missing in the zone. All of them are on different IP networks.
bw,
co.bw,
ac.bw,
btc.bw,
net.bw and at least 50 other hosts share nameservers with this domain.
co.bw is a domain controlled by three nameservers at
btc.bw. Two of them are on the same IP network.