AS53031 Criteo do Brasil Desenvolvimento de Serv Internet
18.104.22.168/21 - ARC46
inetnum: 177.73.128/21 status: assigned owner: Criteo do Brasil Desenvolvimento de Serv Internet city: São Paulo country: BR owner-c: ARC46 tech-c: ARC46 abuse-c: ARC46 created: 2011-08-26 changed: 2013-03-06 source: LACNIC nic-hdl: ARC46 person: Arthur Chevalier e-mail: ARC46@NUMERACAO.REGISTRO.BR address: Av. das Nações Unidas, 11541, 7º andar address: 04578-000 - São Paulo - SP country: BR phone: +55 11 55093511  created: 20130306 changed: 20130308
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.