187.254.224.0/20

inetnum:     187.254/16
status:      allocated
aut-num:     N/A
owner:       Cablevision Red, S.A de C.V.
ownerid:     MX-CRSC10-LACNIC
responsible: Luis Vielma Ordoñes
address:     Av. Naciones Unidas, 5526, Col. Vallarta Universidad
address:     45110 - Guadalajara - JL
country:     MX
phone:       +52 33 37700015 []
owner-c:     GAL2
tech-c:      GAL2
abuse-c:     GAL2
inetrev:     187.254/16
nserver:     DNS.CYBERCABLE.NET.MX  
nsstat:      20170303 AA
nslastaa:    20170303
created:     20130222
changed:     20130222

nic-hdl:     GAL2
person:      IP Master
e-mail:      ipmasterTC@IZZI.MX
address:     Hidalgo, 2074, Col. Ladrón de Guevara
address:     44650 - Guadalajara - Ja
country:     MX
phone:       +52  5550225413 []
created:     20040107
changed:     20170111

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.