AS262271 R.C.A. Sistemas Ltda.
18.104.22.168/21 - DAM68
inetnum: 186.219.112/21 status: allocated owner: R.C.A. Sistemas Ltda. city: Itaocara country: BR owner-c: DAM68 tech-c: EMF19 abuse-c: EMF19 inetrev: 186.219.112/21 nserver: DNSMASTER.RCASISTEMAS.NET.BR nserver: DNS2.RCASISTEMAS.NET.BR created: 2012-06-19 changed: 2013-10-01 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.