inet6num: 2a00,1928,,/32 netname: DE-IMSC-20091231 country: DE org: ORG-IMG1-RIPE admin-c: HrG32-RIPE tech-c: HrG32-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: IMSC-MNT mnt-routes: IMSC-MNT notify: firstname.lastname@example.org created: 2009-12-31T12,30,01Z last-modified: 2017-02-16T10,06,48Z source: RIPE organisation: ORG-IMG1-RIPE org-name: Hees riconet GmbH org-type: LIR address: Leimbachstrafse 266 address: 57074 address: Siegen address: GERMANY phone: +492714881261 fax-no: +492714881260 e-mail: email@example.com admin-c: CO644-RIPE admin-c: MT4627-RIPE admin-c: PG10773-RIPE mnt-ref: IMSC-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: IMSC-MNT abuse-mailbox: firstname.lastname@example.org abuse-c: HrG32-RIPE created: 2004-04-17T11,08,23Z last-modified: 2017-02-16T10,06,51Z source: RIPE role: Hostmaster riconet GmbH address: Hees riconet GmbH address: Leimbachstrasse 266 address: 57074 Siegen address: Germany phone: +49 271 4881 261 fax-no: +49 271 4881 260 e-mail: email@example.com remarks: trouble, Questions and bug reports to , firstname.lastname@example.org admin-c: MT4627-RIPE admin-c: PG10773-RIPE tech-c: MT4627-RIPE tech-c: PG10773-RIPE abuse-mailbox: email@example.com nic-hdl: HrG32-RIPE mnt-by: IMSC-MNT e-mail: firstname.lastname@example.org created: 2010-11-02T15,28,04Z last-modified: 2015-12-08T14,48,09Z source: RIPE route6: 2a00,1928,,/32 descr: Riconet IPv6 PA space origin: AS12898 mnt-by: IMSC-MNT created: 2010-12-02T12,37,14Z last-modified: 2010-12-02T12,37,14Z 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.