AS28571 UNIVERSIDADE DE SAO PAULO
18.104.22.168/16 - CEU4
inetnum: 177.90/16 status: assigned owner: UNIVERSIDADE DE SAO PAULO city: São Paulo country: BR owner-c: CEU4 tech-c: CTU6 abuse-c: CUT created: 2013-11-13 changed: 2015-11-12 source: LACNIC
IP address subranges within this IP range
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.