V6NetHandle: NET6-2606-E600-1 OrgID: ACCR Parent: NET6-2600-1 NetName: ANI-003 NetRange: 2606:E600:: - 2606:E600:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2011-02-16 Updated: 2011-02-16 Source: ARIN OrgID: ACCR OrgName: Accretive Networks CanAllocate: Street: 800 Stewart St City: Seattle State/Prov: WA Country: US PostalCode: 98101 RegDate: 1970-01-01 Updated: 2014-07-23 ReferralServer: rwhois://rwhois.accretive-networks.net:4321 OrgTechHandle: NET-ARIN OrgNOCHandle: NOC152-ARIN OrgAdminHandle: IA102-ARIN OrgAbuseHandle: IA102-ARIN Source: ARIN
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.