inetnum: 2001:1340::/32 status: assigned aut-num: N/A owner: Red CENIAInternet ownerid: CU-CENI-LACNIC responsible: Beatriz Alonso Becerra address: Ave 47 e/ 18A y 20. Miramar. Playa, S/N, address: CP11300 - La Habana - country: CU phone: +53 7 2048202  owner-c: BAB tech-c: EGL abuse-c: EGL inetrev: 2001:1340::/32 nserver: NS.CENIAI.NET.CU nsstat: 20170305 AA nslastaa: 20170305 nserver: NS2.CENIAI.NET.CU nsstat: 20170305 AA nslastaa: 20170305 created: 20050406 changed: 20110517 nic-hdl: BAB person: Beatriz Alonso Becerra e-mail: abe@CENIAI.INF.CU address: Ave 47 e/ 18A y 20. Miramar. Playa, S/N, address: CP11300 - La Habana - country: CU phone: +53 7 2048202  created: 20021009 changed: 20051007 nic-hdl: EGL person: Elena Grimany López e-mail: grimany@CENIAI.INF.CU address: Ave 47 e/ 18A y 20. Miramar., S/N, address: CP11300 - Ciudad Habana - country: CU phone: +53 7 8620733  created: 20021003 changed: 20150409
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.