inetnum: 189.204.128/17 status: allocated aut-num: N/A owner: Operbes, S.A. de C.V. ownerid: MX-OSCV9-LACNIC responsible: Isaac Torres Galvan address: Javier Barros Sierra, 540, Col. Lomas de Santa Fe address: 01219 - Deleg. Alvaro Obregon - CX country: MX phone: +52 5553542100  owner-c: INI2 tech-c: INI2 abuse-c: INI2 inetrev: 189.204.128/17 nserver: DNS1.BESTEL.COM.MX nsstat: 20170305 AA nslastaa: 20170305 nserver: DNS2.BESTEL.COM.MX nsstat: 20170305 AA nslastaa: 20170305 created: 20140522 changed: 20140522 nic-hdl: INI2 person: Abuse Bestel e-mail: igengg@BESTEL.COM.MX address: Santa Apolonia, 9, Santa Apolonia address: 02790 - Mexico - CX country: MX phone: +52 5550225408  created: 20040901 changed: 20170111
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.