V6NetHandle: NET6-2620-4-2000-1 OrgID: PIL-97 Parent: NET6-2620-1 NetName: PIL-97-V6 NetRange: 2620:4:2000:: - 2620:4:2000:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment RegDate: 2016-07-28 Updated: 2016-07-28 Source: ARIN OrgID: PIL-97 OrgName: Phoenix Investors, LLC CanAllocate: Street: 401 E KILBOURN AVE STE 201 City: MILWAUKEE State/Prov: WI Country: US PostalCode: 53202-3212 RegDate: 2015-12-15 Updated: 2016-07-05 OrgNOCHandle: JOSEP146-ARIN OrgTechHandle: JOSEP146-ARIN OrgAdminHandle: JOSEP146-ARIN OrgAbuseHandle: JOSEP146-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.