AS11993 BANCO DO BRASIL S.A.
2801:8e::/32 - BAB12
inetnum: 2801:8e::/32 status: assigned owner: BANCO DO BRASIL S.A. city: Brasília country: BR owner-c: BAB12 tech-c: EKF abuse-c: EKF created: 2010-12-22 changed: 2013-03-08 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.