inetnum: 2804:bd0::/32 aut-num: AS10670 abuse-c: SEIPR2 owner: COMPANHIA DE TECNOLOGIA DA INFORMAÇÃO ESTADO MG ownerid: 16.636.540/0001-04 responsible: Governo do Estado de Minas Gerais owner-c: PGM14 tech-c: PGM14 created: 20121019 changed: 20130308 nic-hdl-br: PGM14 person: Prodemge Ger. Rede - Dominios MG.GOV.BR created: 20000901 changed: 20161018 nic-hdl-br: SEIPR2 person: SEGURANCA INTERNET PRODEMGE created: 20130819 changed: 20130819
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.