inet6num: 2001,67c,202c,,/48 netname: HOGANAS-KOMMUN-NET country: SE org: ORG-ABUS728-RIPE sponsoring-org: ORG-RESI1-RIPE admin-c: ML18307-RIPE tech-c: ML18308-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: RESILANS-MNT mnt-routes: AS1257-MNT created: 2015-06-02T14,09,12Z last-modified: 2016-04-14T10,14,39Z source: RIPE organisation: ORG-ABUS728-RIPE org-name: Hoganas kommun org-type: OTHER address: Centralgatan 20 address: SE-263 82 Hoganas address: Sweden e-mail: email@example.com abuse-c: ABUS2229-RIPE mnt-ref: RESILANS-MNT mnt-by: RESILANS-MNT created: 2013-03-14T13,50,19Z last-modified: 2015-06-01T14,20,13Z source: RIPE person: Mats Lofgren address: Hoganas kommun address: Centralgatan 20 address: SE-263 82 Hoganas address: Sweden phone: +46 42 337 101 e-mail: firstname.lastname@example.org nic-hdl: ML18307-RIPE mnt-by: RESILANS-MNT created: 2015-06-01T14,11,07Z last-modified: 2015-06-01T14,11,07Z source: RIPE person: Magnus Lodin address: Hoganas kommun address: Centralgatan 20 address: SE-263 82 Hoganas address: Sweden phone: +46 42 337 777 e-mail: email@example.com nic-hdl: ML18308-RIPE mnt-by: RESILANS-MNT created: 2015-06-01T14,11,07Z last-modified: 2015-06-01T14,11,07Z source: RIPE route6: 2001,67c,202c,,/48 descr: TELE2/ SWIPNET descr: TELE2-HOGANAS In case of improper use originating from this network, please mail customer or origin: AS1257 notify: firstname.lastname@example.org notify: email@example.com mnt-by: AS1257-MNT created: 2015-11-30T09,56,17Z last-modified: 2015-11-30T09,56,17Z 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.