AS11960 EMPRESA DE TELECOMUNICACIONES DE CUBA S.A. (IXP CUBA)
2001:13c8::/32 - JOQ
inetnum: 2001:13c8::/32 status: assigned owner: EMPRESA DE TELECOMUNICACIONES DE CUBA S.A. (IXP CUBA) city: La Habana country: CU owner-c: JOQ tech-c: JOQ abuse-c: JEM52 created: 2005-08-18 changed: 2017-03-13 source: LACNIC
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.