inetnum: 2801:80:1400::/40 aut-num: AS11097 abuse-c: CFP8 owner: EMPRESA BRASILEIRA DE PESQUISA AGROPECUARIA ownerid: 00.348.003/0001-10 responsible: Silvia Maria Fonseca Silveira Massruhá owner-c: SMFSM2 tech-c: CFP8 inetrev: 2801:80:1400::/40 nserver: sol.cnptia.embrapa.br nsstat: 20170305 AA nslastaa: 20170305 nserver: rigel.cnptia.embrapa.br nsstat: 20170305 AA nslastaa: 20170305 nserver: inga.cnpm.embrapa.br nsstat: 20170305 AA nslastaa: 20170305 nserver: ipe.cnpm.embrapa.br nsstat: 20170305 AA nslastaa: 20170305 nserver: mamona.sede.embrapa.br nsstat: 20170305 AA nslastaa: 20170305 created: 20150706 changed: 20160211 nic-hdl-br: SMFSM2 person: Silvia Maria Fonseca Silveira Massruhá created: 20150729 changed: 20170209 nic-hdl-br: CFP8 person: Carlos Fernando Assis Paniago created: 19990617 changed: 20161123
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.