inetnum: 2800:3e0::/32 status: allocated aut-num: N/A owner: Sprint Nextel ownerid: VE-SPNE-LACNIC responsible: Yi Chu address: Avda.Francisco Miranda,Cent.Lido,Torre D, s/n, Piso4, 40-HQ address: 1060 - Caracas - DC country: VE phone: +58 212 9056306  owner-c: KEW tech-c: YIC abuse-c: KEW inetrev: 2800:3e0::/32 nserver: NS1-AUTH.SPRINTLINK.NET nsstat: 20170302 AA nslastaa: 20170302 nserver: NS2-AUTH.SPRINTLINK.NET nsstat: 20170302 AA nslastaa: 20170302 nserver: NS3-AUTH.SPRINTLINK.NET nsstat: 20170302 AA nslastaa: 20170302 created: 20091026 changed: 20120418 nic-hdl: KEW person: Ken West e-mail: ken.r.west@SPRINT.COM address: 12502 Sunrise Valley Drive, NA, address: 20196 - Reston - VA country: US phone: +1 703 6897151  created: 20090903 changed: 20170125 nic-hdl: YIC person: Yi Chu e-mail: yi.chu@SPRINT.COM address: 12000 Sunrise Valley Dr, , address: 20191 - Reston - VA country: US phone: +1 703 5924850  created: 20110518 changed: 20110606
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.