inet6num: 2a02,a400,,/25 netname: NL-WAPI-20110610 country: NL org: ORG-WAPI1-RIPE admin-c: PT978-RIPE admin-c: KPN-RIPE tech-c: PT978-RIPE tech-c: KPN-RIPE status: ALLOCATED-BY-RIR notify: email@example.com notify: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: KPN-MNT mnt-lower: KPN-MNT mnt-routes: KPN-MNT mnt-domains: KPN-MNT created: 2011-06-10T14,20,06Z last-modified: 2016-06-03T13,19,11Z source: RIPE organisation: ORG-WAPI1-RIPE org-name: KPN B.V. org-type: LIR address: Röntgenlaan 75 address: 2719 DX address: Zoetermeer address: NETHERLANDS phone: +31 70 4513398 phone: +31 30 6588612 fax-no: +31 30 6588290 e-mail: email@example.com admin-c: AP2254-RIPE admin-c: RG1525-RIPE admin-c: RH13540-RIPE admin-c: RH672-RIPE admin-c: PBOS-RIPE admin-c: BAKC-RIPE abuse-c: PT978-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: KPN-MNT abuse-mailbox: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: KPN-MNT created: 2004-04-17T11,44,04Z last-modified: 2016-09-30T08,14,48Z source: RIPE role: KPN Internet address: KPN address: P.O. Box 30000 address: 2500 GA Den Haag address: Netherlands phone: +31 70 4513500 phone: +31 70 4513398 fax-no: +31 70 4511116 abuse-mailbox: email@example.com e-mail: firstname.lastname@example.org e-mail: IP-Registry@kpn.com remarks: trouble, +---------------------------------------------- remarks: trouble, | Operational issues, email@example.com | remarks: trouble, | Peering issues, firstname.lastname@example.org | remarks: trouble, +---------------------------------------------- admin-c: JZ1998-RIPE admin-c: PBOS-RIPE admin-c: FVD5-RIPE admin-c: TJ354-RIPE tech-c: BC70-RIPE tech-c: MH5996-RIPE tech-c: AO1625-RIPE tech-c: FVD5-RIPE tech-c: TJ354-RIPE remarks: ======================================== remarks: Role Object for KPN Internet Solutions remarks: For urgent operational issues, change requests, routing remarks: policies, etc use the email address "email@example.com" remarks: For portscans, DoS attacks and spam complaints, please remarks: use the email address "firstname.lastname@example.org". remarks: Please include all headers and logging where appropriate. remarks: For domain changes use the email address "email@example.com" remarks: ======================================== nic-hdl: KPN-RIPE mnt-by: AS286-MNT created: 2004-08-11T08,57,52Z last-modified: 2016-09-08T07,36,53Z source: RIPE role: KPN B.V. address: Stationsstraat 115 (visit address) address: P.O. box 3053 address: 3800 DB Amersfoort address: The Netherlands phone: +31 30 6588612 e-mail: firstname.lastname@example.org remarks: Operational issues, email@example.com remarks: Peering issues, firstname.lastname@example.org nic-hdl: PT978-RIPE admin-c: RH13540-RIPE tech-c: RH13540-RIPE remarks: For security & abuse issues see inetnum. abuse-mailbox: email@example.com notify: firstname.lastname@example.org mnt-by: AS8737-MNT mnt-by: KPN-MNT created: 2003-04-02T10,49,57Z last-modified: 2015-06-26T08,21,48Z source: RIPE route6: 2a02,a400,,/25 descr: KPN B.V. origin: AS1136 notify: email@example.com mnt-by: KPN-MNT mnt-routes: KPN-MNT created: 2015-09-01T11,26,27Z last-modified: 2015-09-01T11,26,27Z 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.