inet6num: 2a02,430,,/32 netname: DE-INTERSAAR-20080528 country: de org: ORG-iG17-RIPE admin-c: VM114-RIPE tech-c: VM114-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-lower: INTERSAAR-MNT mnt-routes: INTERSAAR-MNT notify: email@example.com created: 2008-05-28T10,13,45Z mnt-domains: INTERSAAR-MNT last-modified: 2016-04-14T08,22,38Z source: RIPE organisation: ORG-iG17-RIPE org-name: intersaar GmbH org-type: LIR address: Neunkircherstr. 118A address: 66113 address: Saarbruecken address: GERMANY phone: +49 681 94819 0 fax-no: +49 681 94819 88 e-mail: firstname.lastname@example.org abuse-c: AR14614-RIPE admin-c: VM114-RIPE admin-c: AS2393-RIPE admin-c: MK2756-RIPE mnt-ref: INTERSAAR-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT created: 2004-04-17T11,08,52Z last-modified: 2015-05-22T11,30,44Z source: RIPE person: Volker Musebrink address: intersaar GmbH address: Neunkircherstrasse 118A address: D-66113 Saarbruecken address: Germany phone: +49 681 94819 0 fax-no: +49 681 94819 88 e-mail: email@example.com nic-hdl: VM114-RIPE mnt-by: INTERSAAR-MNT created: 1970-01-01T00,00,00Z last-modified: 2001-09-22T01,11,13Z source: RIPE route6: 2a02,430,,/32 descr: intersaar cidr block origin: AS12941 mnt-by: INTERSAAR-MNT created: 2010-12-07T10,46,45Z last-modified: 2010-12-07T10,46,45Z 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.