inet6num: 2a02,558,,/32 netname: HU-EXTERNET-20080626 country: HU org: ORG-EK1-RIPE admin-c: lt1283-ripe tech-c: lt1283-ripe status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-lower: EXTERNET-MNT mnt-routes: EXTERNET-MNT notify: email@example.com created: 2008-06-26T14,57,11Z last-modified: 2016-04-14T09,59,46Z source: RIPE organisation: ORG-EK1-RIPE org-name: Externet Nyrt org-type: LIR address: Szapary 18. address: 5000 address: Szolnok address: HUNGARY phone: +36 56 523 111 fax-no: +36 56 523 110 abuse-c: AR15459-RIPE admin-c: BR1490-RIPE admin-c: LT1283-RIPE mnt-ref: AS12594-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT created: 2004-04-17T11,26,00Z last-modified: 2016-03-11T09,54,50Z source: RIPE e-mail: firstname.lastname@example.org person: Leto Tokarev address: 5000 Szolnok, Szapary 18 mnt-by: externet-mnt phone: +36 56 523-111 nic-hdl: LT1283-RIPE created: 2005-04-26T10,03,30Z last-modified: 2008-02-11T16,58,13Z source: RIPE e-mail: email@example.com route6: 2a02,558,,/32 descr: Externet ISP origin: AS12594 mnt-by: externet-mnt created: 2009-05-06T07,38,01Z last-modified: 2009-05-06T07,38,01Z 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.