NetHandle: NET-129-246-0-0-1 OrgID: IDA-2-Z Parent: NET-129-0-0-0-0 NetName: IDA NetRange: 220.127.116.11 - 18.104.22.168 NetType: assignment RegDate: 1988-03-29 Updated: 2012-04-02 TechHandle: DL1558-ARIN Source: ARIN OrgID: IDA-2-Z OrgName: Institute for Defense Analyses CanAllocate: Street: 4850 Mark Center Dr City: Alexandria State/Prov: VA Country: US PostalCode: 22311 RegDate: 2010-02-01 Updated: 2010-02-01 OrgTechHandle: CMU49-ARIN OrgNOCHandle: SKA100-ARIN OrgAbuseHandle: DL1558-ARIN OrgAdminHandle: JPR121-ARIN Source: ARIN
IP Addresses in this range
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.