AS22085 Claro S/A
2804:388:4000::/34 - CLV11
inetnum: 2804:388::/30 status: allocated owner: Claro S/A city: São Paulo country: BR owner-c: CLV11 tech-c: CLV11 abuse-c: CLV11 created: 2011-01-18 changed: 2013-03-08 source: LACNIC nic-hdl: CLV11 person: CLaro - Voz/Dados e-mail: CLV11@NUMERACAO.REGISTRO.BR address: Av. das Nações Unidas, 11541, 7º andar address: 04578-000 - São Paulo - SP country: BR phone: +55 11 55093511  created: 20130306 changed: 20130308
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.