ns4.colt.net has one IP number , which also has a corresponding reverse pointer. colt.net, allcoat.com, ws.colt.net, ims.colt.net, cdn.colt.net and at least 100 other hosts use this as a nameserver. colt.net is a domain controlled by three nameservers at colt.net themselves. Two of them are on the same IP network. Incoming mail for colt.net is handled by four mailservers at colt-telecom.com. All of them are on the same IP network. colt.net has one IP number. ns4.colt.net is hosted on a server in Germany.