inet6num: 2001,67c,17f4,,/48 netname: SVEDALA-KOMMUN country: SE org: ORG-SK10-RIPE admin-c: PK5412-RIPE tech-c: MW5559-RIPE status: ASSIGNED PI mnt-by: TELIANET-LIR mnt-by: RIPE-NCC-END-MNT mnt-routes: TELIANET-RR mnt-domains: TELIANET-LIR created: 2013-06-13T09,40,28Z last-modified: 2016-04-14T08,28,42Z source: RIPE sponsoring-org: ORG-TA44-RIPE organisation: ORG-SK10-RIPE org-name: Svedala Kommun org-type: OTHER address: Att, Pekka Kalliomäki address: Kommunhuset address: 23380 Svedala address: Sweden e-mail: email@example.com abuse-c: AR29661-RIPE mnt-ref: EBBnet-MNT mnt-by: EBBnet-MNT created: 2005-11-01T12,57,21Z last-modified: 2014-11-17T22,43,40Z source: RIPE person: Mikael Wigerhall address: Svedala Kommun address: Kommunhuset address: 23380 Svedala address: Sweden phone: +46.406410104 fax-no: +46.40402460 e-mail: firstname.lastname@example.org nic-hdl: MW5559-RIPE mnt-by: SWIPNET-LIR-MNT created: 2012-01-24T09,05,29Z last-modified: 2012-01-24T09,05,29Z source: RIPE person: Pekka Kalliomaki address: Svedala Kommun address: Kommunhuset address: 23380 Svedala address: Sweden phone: +46.40408378 fax-no: +46.40402460 e-mail: email@example.com nic-hdl: PK5412-RIPE mnt-by: SWIPNET-LIR-MNT created: 2012-01-24T09,05,29Z last-modified: 2012-01-24T09,05,29Z source: RIPE route6: 2001,67c,17f4,,/48 descr: TELE2/ SWIPNET descr: TELE2-Svedala Kommun In case of improper use originating from this network, please mail or origin: AS1257 notify: firstname.lastname@example.org notify: email@example.com mnt-by: AS1257-MNT created: 2015-04-13T12,26,07Z last-modified: 2015-04-13T12,26,07Z 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.