V6NetHandle: NET6-2607-DD00-1 OrgID: CCLAUBBC Parent: NET6-2600-1 NetName: UC2B-V6 NetRange: 2607:DD00:: - 2607:DD00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10932 RegDate: 2012-07-23 Updated: 2012-07-23 Source: ARIN OrgID: CCLAUBBC OrgName: UC2B CanAllocate: Street: 102 North Neil Street City: Champaign State/Prov: IL Country: US PostalCode: 61820 RegDate: 2012-02-28 Updated: 2017-01-28 OrgAdminHandle: UCBTE-ARIN OrgAbuseHandle: UCBAB-ARIN OrgNOCHandle: UCBTE-ARIN OrgTechHandle: UCBTE-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.