inetnum: 2800:100::/32 status: assigned aut-num: N/A owner: Universidad Simon Bolivar ownerid: VE-USBO1-LACNIC responsible: Nicola Baglivi address: DST. Edificio MYS, Planta Baja, Sartenejas, Baruta, --, address: 1080 - Caracas - country: VE phone: +58 212 9063200  owner-c: NIB tech-c: JPF3 abuse-c: JPF3 created: 20070312 changed: 20110627 nic-hdl: JPF3 person: Javier Pose Fernandez e-mail: jpose@USB.VE address: Valle Sartenejs, EDF. MYS-008, USB, -, - address: 1080 - Caracas - DC country: VE phone: +58 212 9063212  created: 20070227 changed: 20070228 nic-hdl: NIB person: Nicola Baglivi e-mail: nbaglivi@USB.VE address: USB. Dirección de Servicios Telemáticos. Edf. MYS,, 024, Planta Baja address: 1080 - Caracas - MI country: VE phone: +58 212 9063200  created: 20100125 changed: 20100125
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.