AS3549 Level 3 Parent, LLC
2804:2454::/32 - HDM9
inetnum: 2804:2454::/32 status: allocated owner: Wlenet Telecom city: Niterói country: BR owner-c: HDM9 tech-c: HDM9 abuse-c: IST10 created: 2015-04-14 changed: 2019-05-15 source: LACNIC nic-hdl: IST10 person: ISP TI e-mail: IST10@NUMERACAO.REGISTRO.BR address: Av. das Nações Unidas, 11541, 7º andar address: 04578-000 - Londrina - PR country: BR phone: +55 43 55093511  created: 20130422 changed: 20130422 nic-hdl: HDM9 person: Hamilton dos Santos Monteiro e-mail: HDM9@NUMERACAO.REGISTRO.BR address: Av. das Nações Unidas, 11541, 7º andar address: 04578-000 - Niterói - RJ country: BR phone: +55 21 55093511  created: 20190515 changed: 20190515
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.