V6NetHandle: NET6-2604-700-1 OrgID: TVA Parent: NET6-2600-1 NetName: TVA-IPV6 NetRange: 2604:700:: - 2604:700:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10384 RegDate: 2011-03-18 Updated: 2014-06-16 NOCHandle: RLT1-ARIN AbuseHandle: RLT1-ARIN TechHandle: RLT1-ARIN Source: ARIN OrgID: TVA OrgName: Tennessee Valley Authority CanAllocate: Street: 1101 MARKET STREET Street: MP 2H City: CHATTANOOGA State/Prov: TN Country: US PostalCode: 37402 RegDate: 1991-08-28 Updated: 2017-01-28 OrgAbuseHandle: RLT1-ARIN OrgAdminHandle: DWB64-ARIN OrgTechHandle: RLT1-ARIN OrgNOCHandle: RLT1-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.