V6NetHandle: NET6-2606-A500-1 OrgID: MVANET Parent: NET6-2600-1 NetName: USAI-IPV6 NetRange: 2606:A500:: - 2606:A500:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10653 RegDate: 2011-12-22 Updated: 2011-12-22 Source: ARIN OrgID: MVANET OrgName: USAI.NET CanAllocate: Street: 143 Essex St Street: 6Th Floor City: Haverhill State/Prov: MA Country: US PostalCode: 01832 RegDate: 1997-10-16 Updated: 2017-01-28 ReferralServer: rwhois://rwhois.usai.net:4321 OrgAdminHandle: DS4296-ARIN OrgTechHandle: DS4296-ARIN OrgAbuseHandle: DS4296-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.