V6NetHandle: NET6-2606-1400-1 OrgID: TIER Parent: NET6-2600-1 NetName: TIERRANET-4BLK NetRange: 2606:1400:: - 2606:1400:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10732 RegDate: 2010-08-30 Updated: 2012-02-24 TechHandle: BS261-ARIN Source: ARIN OrgID: TIER OrgName: TierraNet Inc. CanAllocate: Street: PO BOX 502010 City: San Diego State/Prov: CA Country: US PostalCode: 92150-2010 RegDate: 1997-11-11 Updated: 2017-01-28 OrgAdminHandle: BS261-ARIN OrgTechHandle: BS261-ARIN OrgAbuseHandle: BS261-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.