inet6num: 2001,67c,2154,,/48 netname: SMARTCOMBG country: BG org: ORG-SCB5-RIPE admin-c: KVA7-RIPE tech-c: KVA7-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: HAEMIMONT-MNT mnt-routes: HAEMIMONT-MNT mnt-domains: HAEMIMONT-MNT created: 2011-03-16T16,11,08Z last-modified: 2016-04-14T09,49,05Z source: RIPE sponsoring-org: ORG-MN1-RIPE organisation: ORG-SCB5-RIPE org-name: Smartcom Bulgaria AD org-type: OTHER address: 7th km Tzarigradsko shosse blvd. address: BIC IZOT, off. 317 address: Sofia 1784 address: Bulgaria e-mail: firstname.lastname@example.org abuse-c: AR19479-RIPE mnt-ref: SPNET-MNT mnt-ref: HAEMIMONT-MNT mnt-by: SPNET-MNT mnt-by: HAEMIMONT-MNT created: 2011-02-07T09,56,17Z last-modified: 2014-03-28T07,13,42Z source: RIPE person: Krassimir Avramsky address: 7th km Tzarigradsko shosse blvd. address: BIC IZOT, off.424, Sofia 1784 address: Bulgaria phone: +359 2 9650 505 fax-no: +359 2 974 3469 e-mail: email@example.com nic-hdl: KVA7-RIPE mnt-by: HAEMIMONT-MNT notify: firstname.lastname@example.org created: 1970-01-01T00,00,00Z last-modified: 2002-12-10T14,15,02Z source: RIPE route6: 2001,67c,2154,,/48 descr: Smartcom Bulgaria AD v6 PI space origin: AS12591 mnt-by: HAEMIMONT-MNT created: 2011-03-17T12,21,56Z last-modified: 2011-03-17T12,21,56Z 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.