V6NetHandle: NET6-2600-C05-3002-1 OrgID: C04779189 Parent: NET6-2600-C00-1 NetName: INAP-PHX003-GIGLINX-IPV6-9287-118058 NetRange: 2600:C05:3002:: - 2600:C05:3002:0:FFFF:FFFF:FFFF:FFFF NetType: reassignment Comment: rirCallout v1.07, Fri Nov 22 20:32:48 -0500 2013 RegDate: 2013-11-22 Updated: 2013-11-22 Source: ARIN OrgID: C04779189 OrgName: Private Customer CanAllocate: Street: Private Residence City: Torrance State/Prov: CA Country: US PostalCode: 90503 Comment: created by rirCallout v1.07 for NET6-2600-C00-1 RegDate: 2013-11-22 Updated: 2013-11-22 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.