201.20.133.0/24

inetnum:    201.20.128/20
status:     assigned
owner:      TAM Linhas Aereas S/A
city:       São Paulo
country:    BR
owner-c:    THT2
tech-c:     THT2
abuse-c:    THT2
inetrev:    201.20.137/24
nserver:    NS01.TAM.COM.BR
nserver:    NS02.TAM.COM.BR
created:    2005-12-12
changed:    2013-03-06
source:     LACNIC


nic-hdl:     THT2
person:      TAM Hostmaster Team
e-mail:      THT2@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.