inetnum: 177.87.240/21 status: allocated owner: EDATEL TELECOMUNICAÇÕES LTDA. city: Rio de Janeiro country: BR owner-c: WIO5 tech-c: WIO5 abuse-c: DLF11 inetrev: 177.87.240/21 nserver: NS1.LINKFULL.COM.BR nserver: NS2.LINKFULL.COM.BR created: 2011-12-13 changed: 2018-05-08 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.