nj.bo.comcast.net, de.bo.comcast.net and pa.bo.comcast.net are subdomains to this hostname. comcast.net is a domain controlled by three nameservers at comcast.net themselves. All of them are on different IP networks. Incoming mail for comcast.net is handled by eight mailservers also at comcast.net. There are four duplicated IP numbers. Some of them are on the same IP network. comcast.net has four IP numbers. Some of them are on the same IP network.