AS14048 The University of Memphis
2001:468:1b00::/40 - INTERNET2
V6NetHandle: NET6-2001-468-1 OrgID: INTER-395 Parent: NET6-2001-400-0 NetName: INTERNET2 NetRange: 2001:468:: - 2001:468:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11537 RegDate: 2001-03-12 Updated: 2018-01-02 Source: ARIN OrgID: INTER-395 OrgName: Internet2 CanAllocate: Street: 100 Phoenix DR Street: suite 111 City: Ann Arbor State/Prov: MI Country: US PostalCode: 48108 RegDate: 2005-01-31 Updated: 2017-01-28 OrgTechHandle: ZEKAU-ARIN OrgTechHandle: WILKI169-ARIN OrgTechHandle: BARTI-ARIN OrgNOCHandle: NOCAB-ARIN OrgAdminHandle: ZEKAU-ARIN OrgAbuseHandle: INDIA-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.