inetnum: 2804:5ac::/32 aut-num: AS10412 abuse-c: RAISC owner: CIA. DE TECNOL. DA INFOR. E COMUNICAÇÃO DO PARANÁ ownerid: 76.545.011/0001-19 responsible: CIA. DE TECNOL. DA INFOR. E COMUNICAÇÃO owner-c: ADC633 tech-c: ADC633 created: 20110711 changed: 20130308 nic-hdl-br: ADC633 person: Administracao Dominios Celepar created: 20060530 changed: 20140325 nic-hdl-br: RAISC person: Resposta a Incidentes Seguranca CELEPAR created: 20130125 changed: 20130125
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.