AS131 University of California, Santa Barbara
2607:f378::/32 - UCSB-V6-NET1
V6NetHandle: NET6-2607-F378-1 OrgID: UCSB Parent: NET6-2600-1 NetName: UCSB-V6-NET1 NetRange: 2607:F378:: - 2607:F378:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 131 Comment: http://noc.ucsb.edu RegDate: 2008-03-07 Updated: 2012-03-02 Source: ARIN OrgID: UCSB OrgName: University of California, Santa Barbara CanAllocate: Street: Office of Information Technology Street: North Hall 2124 City: Santa Barbara State/Prov: CA Country: US PostalCode: 93106-3201 RegDate: 1986-02-18 Updated: 2017-01-28 OrgAbuseHandle: NETWO4536-ARIN OrgAdminHandle: KS1217-ARIN OrgTechHandle: KS1217-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.