inetnum: 2800:a10::/32 status: allocated aut-num: N/A owner: CPS ownerid: AR-CPSC2-LACNIC responsible: Adrian Gaido address: J. A. Roca, 620, P 8 address: 1067 - Capital Federal - CF country: AR phone: +54 11 60911030  owner-c: ADG3 tech-c: ADG3 abuse-c: ADG3 created: 20110916 changed: 20110916 nic-hdl: ADG3 person: Adrian Gaido 1 e-mail: abuse@METROTEL.COM.AR address: Tacuari, 351, P 1 address: 1067 - Capital Federal - country: AR phone: +54 11 60911030  created: 20060908 changed: 20121127
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.