V6NetHandle: NET6-2606-7B00-1 OrgID: TELAL Parent: NET6-2600-1 NetName: TELALASKA-4 NetRange: 2606:7B00:: - 2606:7B00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10538 RegDate: 2011-11-28 Updated: 2012-02-24 Source: ARIN OrgID: TELAL OrgName: TelAlaska CanAllocate: Street: 201 E56th Ave City: Anchorage State/Prov: AK Country: US PostalCode: 99518 RegDate: 2002-11-05 Updated: 2008-10-04 OrgTechHandle: TECHN17-ARIN OrgAbuseHandle: ABUSE100-ARIN OrgAdminHandle: ADMIN52-ARIN OrgNOCHandle: NETWO65-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.