2604:8380::/32 - RACKALLEY-2
AS10480 HIVELOCITY VENTURES CORP
V6NetHandle: NET6-2604-8380-1 OrgID: HVC-3 Parent: NET6-2600-1 NetName: RACKALLEY-2 NetRange: 2604:8380:: - 2604:8380:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10480 RegDate: 2013-12-06 Updated: 2018-03-01 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.