V6NetHandle: NET6-2620-4E-1 OrgID: SYRACU-4 Parent: NET6-2620-1 NetName: SYR-UNIV-NET NetRange: 2620:4E:: - 2620:4E:0:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 11872 RegDate: 2010-07-22 Updated: 2012-03-02 Source: ARIN OrgID: SYRACU-4 OrgName: Syracuse University CanAllocate: Street: Machinery Hall City: Syracuse State/Prov: NY Country: US PostalCode: 13244 RegDate: 1970-01-01 Updated: 2014-05-05 OrgAbuseHandle: NDD-ARIN OrgNOCHandle: NI2-ORG-ARIN OrgAdminHandle: RCG32-ARIN OrgTechHandle: NSK-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.