inet6num: 2a01,8fa,,/32 netname: VODAFONE-ROMANIA descr: Vodafone Romania IPv6 Block country: RO org: ORG-MS15-RIPE admin-c: IOS5-RIPE tech-c: IOS5-RIPE status: ALLOCATED-BY-LIR mnt-by: AS12302-MNT mnt-lower: AS12302-MNT mnt-routes: AS12302-MNT created: 2014-04-03T13,56,35Z last-modified: 2016-05-19T09,02,34Z source: RIPE organisation: ORG-MS15-RIPE org-name: Vodafone Romania S.A. org-type: LIR address: Pipera Tunari Street nr. 2/II address: 077190 address: Voluntari, Ilfov address: ROMANIA phone: +40372022333 fax-no: +40372021333 e-mail: email@example.com admin-c: IOS5-RIPE admin-c: RN1148-RIPE abuse-c: AR16505-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: AS12302-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: AS12302-MNT created: 2004-04-17T11,49,52Z last-modified: 2016-05-19T09,02,31Z source: RIPE role: ISP Support address: Vodafone RO address: Piata Charles de Gaulle nr.15 address: Sector 1 address: Bucharest, Romania phone: +40372022334 e-mail: firstname.lastname@example.org remarks: trouble, Spam mail/news complaints, email@example.com remarks: trouble, Security complaints, firstname.lastname@example.org remarks: trouble, Network Emergencies, NOC +40 37 202 2334 admin-c: IOS3-RIPE tech-c: FD281-RIPE tech-c: RN1148-RIPE nic-hdl: IOS5-RIPE remarks: http,//www.vodafone.ro notify: email@example.com mnt-by: AS12302-MNT created: 2002-09-13T14,19,41Z last-modified: 2014-05-27T12,11,56Z source: RIPE remarks: abuse-mailbox, firstname.lastname@example.org remarks: abuse-mailbox, email@example.com remarks: abuse-mailbox, firstname.lastname@example.org route6: 2a01,8fa,,/32 descr: Vodafone Group Services origin: AS12302 mnt-by: AS12302-MNT created: 2010-12-16T09,31,26Z last-modified: 2010-12-16T09,31,26Z 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.