inet6num: 2a03,67c0,,/32 netname: UK-GBSERVERS-20121121 country: GB org: ORG-GL117-RIPE admin-c: DB17304-RIPE tech-c: DB17304-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: Dan mnt-routes: Dan mnt-routes: MNT-PULSANT notify: email@example.com created: 2012-11-21T09,15,58Z last-modified: 2017-03-05T09,47,29Z mnt-domains: Dan source: RIPE organisation: ORG-GL117-RIPE org-name: GBServers Limited org-type: LIR address: Hunter House address: CM15 8NL address: Brentwood, Essex address: UNITED KINGDOM e-mail: firstname.lastname@example.org mnt-ref: Dan mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: Dan abuse-c: DB18398-RIPE created: 2012-11-19T15,58,07Z last-modified: 2017-03-05T09,47,30Z source: RIPE phone: +448455647395 fax-no: +00 person: Daniel Bronitt address: GBServers Ltd address: Hunter House address: 150 Hutton Road address: Shenfield address: Brentwood address: Essex address: CM15 8NL phone: +448455647395 e-mail: email@example.com nic-hdl: DB17304-RIPE mnt-by: Dan abuse-mailbox: firstname.lastname@example.org created: 2012-11-19T16,03,31Z last-modified: 2015-10-11T19,49,47Z 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.