AS28580 CILNET Comunicacao e Informatica LTDA.
126.96.36.199/21 - IAN
inetnum: 187.84.0/21 status: reallocated owner: CILNET Comunicacao e Informatica LTDA. city: Cerquilho country: BR owner-c: IAN tech-c: IAN abuse-c: IAN inetrev: 187.84.0/21 nserver: SERVER2.FASTERNET.COM.BR nserver: SERVER3.FASTERNET.COM.BR inetnum-up: 187.84.0/20 created: 2016-04-14 changed: 2016-04-14 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.