V6NetHandle: NET6-2620-B8-8000-1 OrgID: WWU Parent: NET6-2620-1 NetName: WWU-IPV6 NetRange: 2620:B8:8000:: - 2620:B8:8000:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 15199 RegDate: 2011-12-05 Updated: 2013-04-30 NOCHandle: WWUNO-ARIN TechHandle: WWUNO-ARIN AbuseHandle: WWUNO-ARIN Source: ARIN OrgID: WWU OrgName: Western Washington University CanAllocate: Street: MS-1450 Street: Western Washington University Street: 516 High Street City: Bellingham State/Prov: WA Country: US PostalCode: 98225 RegDate: 1988-05-10 Updated: 2013-04-30 OrgAdminHandle: RSC91-ARIN OrgAbuseHandle: WWUNO-ARIN OrgNOCHandle: WWUNO-ARIN OrgTechHandle: WWUNO-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.