inet6num: 2a01,b880,,/32 netname: SE-NOSSEBRO-20110706 country: SE org: ORG-Nee1-RIPE admin-c: PE2851-RIPE tech-c: PE2851-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: NOSSEBRO-SE-MNT mnt-routes: NOSSEBRO-SE-MNT notify: firstname.lastname@example.org created: 2011-07-06T07,52,40Z last-modified: 2017-02-16T11,15,44Z source: RIPE organisation: ORG-NEE1-RIPE org-name: Nossebroortens energi ekonomisk org-type: LIR address: LILJEGATAN 15 address: 46530 address: NOSSEBRO address: SWEDEN phone: +46 512 798126 e-mail: email@example.com abuse-c: AR17196-RIPE admin-c: PE2851-RIPE mnt-ref: NOSSEBRO-SE-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: NOSSEBRO-SE-MNT created: 2005-02-21T10,18,06Z last-modified: 2017-02-16T11,15,45Z source: RIPE person: Patrik Edberg address: Nossebro Energi AB address: Liljegatan 15 address: 465 30 Nossebro address: Sweden phone: +46 512 798 126 fax-no: +46 512 502 60 e-mail: firstname.lastname@example.org nic-hdl: PE2851-RIPE mnt-by: NOSSEBRO-SE-MNT created: 1970-01-01T00,00,00Z last-modified: 2006-12-20T17,08,16Z source: RIPE
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.