inet6num: 2a02,1628,,/32 netname: DE-RZ-ONLINE-20100527 country: DE org: ORG-KTG1-RIPE admin-c: RZK1-RIPE tech-c: RZK1-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: RZO-NOC mnt-routes: RZO-NOC notify: email@example.com created: 2010-05-27T09,25,23Z last-modified: 2017-08-14T08,24,26Z source: RIPE organisation: ORG-KTG1-RIPE org-name: Kevag Telekom GmbH org-type: LIR address: Cusanusstr. 7 address: 56073 address: Koblenz address: GERMANY phone: +4926120162242 phone: +4926120162334 fax-no: +492612016225242 e-mail: firstname.lastname@example.org admin-c: AG3851-RIPE admin-c: OG786-RIPE admin-c: RZK1-RIPE admin-c: SD3702-RIPE mnt-ref: RZO-NOC mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: RZO-NOC abuse-c: RZK1-RIPE created: 2004-04-17T11,11,47Z last-modified: 2017-08-14T08,22,17Z source: RIPE role: Hostmaster nic-hdl: RZK1-RIPE address: KEVAG Telekom GmbH address: Cusanusstrasse 7 address: 56073 Koblenz address: DE phone: +49 261 20162-233 fax-no: +49 261 20162-25242 e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org tech-c: OG786-RIPE tech-c: SD3702-RIPE tech-c: AG3851-RIPE remarks: trouble, Questions, email@example.com remarks: trouble, Abuse, firstname.lastname@example.org remarks: trouble, Immediate Action, email@example.com remarks: role account for Hostmaster of the Day remarks: at KEVAG Telekom GmbH admin-c: OG786-RIPE admin-c: SD3702-RIPE admin-c: AG3851-RIPE mnt-by: RZO-NOC created: 2002-03-07T14,19,04Z last-modified: 2017-08-14T08,11,38Z source: RIPE notify: firstname.lastname@example.org route6: 2a02,1628,,/32 descr: KEVAG Telekom GmbH origin: AS12360 mnt-by: RZO-NOC created: 2010-05-28T06,04,37Z last-modified: 2010-05-28T06,04,37Z 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.