inet6num: 2a02,c10,,/32 netname: PL-ONET-20090325 country: PL org: ORG-OS10-RIPE admin-c: ONET1-RIPE tech-c: ONET1-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-lower: PL-ONET1-MNT mnt-routes: PL-ONET1-MNT notify: email@example.com created: 2009-03-25T10,46,34Z last-modified: 2016-04-14T10,20,13Z source: RIPE organisation: ORG-OS10-RIPE org-name: Grupa Onet.pl S.A. org-type: LIR address: ul. Pilotow 10 address: 31-462 address: Krakow address: POLAND phone: +48122774000 fax-no: +48122774002 e-mail: firstname.lastname@example.org mnt-ref: PL-ONET1-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT admin-c: JZ1234-RIPE admin-c: TC1904-RIPE admin-c: WW1313-RIPE admin-c: PP12337-RIPE abuse-c: ONET1-RIPE created: 2004-04-17T11,47,43Z last-modified: 2015-06-11T15,07,27Z source: RIPE role: ONET-PL NETWORK TEAM address: Onet.pl SA address: ITOperations address: ul. Pilotow 10 address: 31-462 Krakow address: Poland phone: +48 12 2774000 fax-no: +48 12 2774002 e-mail: email@example.com remarks: In case any abuse or spam, please write to, firstname.lastname@example.org remarks: In case any mail related problems, write to, email@example.com remarks: In case any client asking, write to, firstname.lastname@example.org remarks: In case any network problems BGP or peering, please send an email to email@example.com or call to +48 12 2657600 abuse-mailbox: firstname.lastname@example.org admin-c: TC1904-RIPE admin-c: PP12337-RIPE tech-c: TC1904-RIPE tech-c: PP12337-RIPE nic-hdl: ONET1-RIPE notify: email@example.com mnt-by: PL-ONET1-MNT created: 2002-03-27T14,47,10Z last-modified: 2016-08-23T08,32,23Z source: RIPE route6: 2a02,c10,,/32 descr: ONET-PL Grupa Onet.pl SA origin: AS12990 mnt-by: AS12990-MNT created: 2010-11-02T12,12,09Z last-modified: 2010-11-02T12,12,09Z 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.