AS10733 DC MATRIX INTERNET S/A
2804:764::/32 - RDS13
inetnum: 2804:764::/32 status: allocated owner: DC MATRIX INTERNET S/A city: São Paulo country: BR owner-c: RDS13 tech-c: RDS13 abuse-c: RDS13 created: 2011-11-17 changed: 2016-05-13 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.