Summary
ns3.ko.com has one IP number , which also has a corresponding reverse pointer.
ko.com,
coke.de,
coke.hu,
fanta.de,
coke.com and at least 100 other hosts use this as a nameserver.
them5.net,
fresca.com,
sprite.com,
i-coke.net,
chaqwa.net and at least 100 other hosts use this as a mailserver.
ko.com is delegated to five nameservers, however one extra nameserver is listed in the zone. Some of them are on the same IP network.
ns3.ko.com is hosted on a server in United States.