inetnum: 2804:15c::/32 aut-num: AS11835 abuse-c: JOCAP44 owner: IPE INFORMATICA LTDA ownerid: 04.263.321/0001-30 responsible: Eduardo Wei country: BR owner-c: EDW2 tech-c: EDW2 created: 20100510 changed: 20170308 nic-hdl-br: EDW2 person: Eduardo Wei e-mail: email@example.com country: BR created: 19971228 changed: 20160705 nic-hdl-br: JOCAP44 person: Joel Cappellesso e-mail: firstname.lastname@example.org country: BR created: 20160705 changed: 20170410
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.