V6NetHandle: NET6-2600-C12-6020-1 OrgID: C06653701 Parent: NET6-2600-C00-1 NetName: INAP-DAL006-DELLSERVICES-IPV6-11017-135760 NetRange: 2600:C12:6020:: - 2600:C12:602F:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reassignment Comment: rirCallout v1.07, Thu Aug 10 16:54:43 -0400 2017 RegDate: 2017-08-10 Updated: 2017-08-10 Source: ARIN OrgID: C06653701 OrgName: Private Customer CanAllocate: Street: Private Residence City: Plano State/Prov: TX Country: US PostalCode: 75023 Comment: created by rirCallout v1.07 for NET6-2600-C00-1 RegDate: 2017-08-10 Updated: 2017-08-10 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.