V6NetHandle: NET6-2605-E780-1 OrgID: PDSL-4 Parent: NET6-2600-1 NetName: PDSV6-1 NetRange: 2605:E780:: - 2605:E780:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11142 RegDate: 2015-01-23 Updated: 2015-01-23 Source: ARIN OrgID: PDSL-4 OrgName: Precision Data Solutions, LLC CanAllocate: Street: 7 W Main St City: Mooresville State/Prov: IN Country: US PostalCode: 46158 RegDate: 2012-06-01 Updated: 2017-01-28 ReferralServer: rwhois://rwhois.cogentco.com:4321 OrgAbuseHandle: ABUSE4682-ARIN OrgAdminHandle: ROGER36-ARIN OrgNOCHandle: ROGER36-ARIN OrgTechHandle: ROGER36-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.