AS13768 Cogeco Peer 1
2001:1978:1100::/40 - PEER1-IPV6-01
V6NetHandle: NET6-2001-1978-1 OrgID: PER1 Parent: NET6-2001-1800-0 NetName: PEER1-IPV6-01 NetRange: 2001:1978:: - 2001:1978:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2004-06-14 Updated: 2012-02-24 TechHandle: ZP55-ARIN Source: ARIN OrgID: PER1 OrgName: Cogeco Peer 1 CanAllocate: Street: 413 Horner Avenue City: Toronto State/Prov: ON Country: CA PostalCode: M8W 4W3 RegDate: 1970-01-01 Updated: 2017-06-27 OrgTechHandle: ZP55-ARIN OrgAdminHandle: ZP55-ARIN OrgAbuseHandle: NSA-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.