inetnum: 2800:190::/32 status: allocated aut-num: N/A owner: Techtel LMDS Comunicaciones Interactivas S.A. ownerid: AR-TLCI-LACNIC responsible: Administrador de Direcciones IP - CLARO address: Garay, 34, address: C1063AB - Buenos Aires - country: AR phone: +54 11 4000-3000  owner-c: JPL3 tech-c: JPL3 abuse-c: JPL3 created: 20070912 changed: 20070912 nic-hdl: JPL3 person: Administración Direcciones IP e-mail: ipaddressing.ar@CLARO.COM.AR address: Av. Juan de Garay, 34, address: C1063ABN - Buenos Aires - country: AR phone: +54 11 4000  created: 20061121 changed: 20150218
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.