AS10954 SERVICO FEDERAL DE PROCESSAMENTO DE DADOS - SERPRO
2804:150:e000::/36 - TAF16
inetnum: 2804:150::/30 status: allocated owner: SERVICO FEDERAL DE PROCESSAMENTO DE DADOS - SERPRO city: Brasília country: BR owner-c: TAF16 tech-c: TAF16 abuse-c: CVS22 inetrev: 2804:150:11::/48 nserver: ANTARES.SERPRO.GOV.BR nserver: TRIFID.SERPRO.GOV.BR nserver: ANDROMEDA.SERPRO.GOV.BR nserver: CANISVENATICI.SERPRO.GOV.BR nserver: CENTAURO.SERPRO.GOV.BR created: 2011-06-22 changed: 2018-09-12 source: LACNIC
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.