AS13768 Cogeco Peer 1
2605:6c80:3::/48 - H4Y-IPV6-BLK1
V6NetHandle: NET6-2605-6C80-1 OrgID: HTL-33 Parent: NET6-2600-1 NetName: H4Y-IPV6-BLK1 NetRange: 2605:6C80:: - 2605:6C80:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 14935, 17216, 397373, 62734, 13768, 397423 RegDate: 2014-05-15 Updated: 2019-04-16 Source: ARIN OrgID: HTL-33 OrgName: H4Y Technologies LLC CanAllocate: Street: 333 Island Dr City: Melbourne Beach State/Prov: FL Country: US PostalCode: 32951 Comment: Standard NOC hours are 24/7 RegDate: 2014-04-08 Updated: 2019-03-08 OrgAbuseHandle: ABUSE4757-ARIN OrgAdminHandle: EDK2-ARIN OrgTechHandle: EDK2-ARIN OrgNOCHandle: EDK2-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.