200.152.16.0/20

inetnum:    200.152.0/19
status:     allocated
owner:      Directnet Prestacao de Servicos Ltda.
city:       São Paulo
country:    BR
owner-c:    ERN3
tech-c:     ERN3
abuse-c:    ERN3
inetrev:    200.152.0/19
nserver:    A.NS.NEOVIATELECOM.COM.BR
nserver:    B.NS.NEOVIATELECOM.COM.BR
created:    2001-12-06
changed:    2013-03-07
source:     LACNIC


nic-hdl:     ERN3
person:      Engenharia de Redes Neovia
e-mail:      ERN3@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 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.