inet6num: 2001,67c,3c,,/48 netname: SE-SWIPNET-20150327 country: SE org: ORG-NA745-RIPE sponsoring-org: ORG-TA44-RIPE admin-c: SWIP-RIPE admin-c: TH2068-RIPE tech-c: SWIP-RIPE tech-c: TH2068-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: SWIPNET-LIR-MNT mnt-routes: AS1257-MNT created: 2015-03-27T16,20,33Z last-modified: 2016-04-14T09,01,30Z source: RIPE organisation: ORG-NA745-RIPE org-name: NETIGRATE AB org-type: OTHER address: Ebbe Lieberathsgatan 18c, 41265 Goteborg, Sweden e-mail: email@example.com abuse-c: AC30156-RIPE mnt-ref: SWIPNET-LIR-MNT mnt-by: SWIPNET-LIR-MNT created: 2015-03-26T13,11,05Z last-modified: 2016-02-15T16,50,50Z source: RIPE role: Swipnet Staff address: Tele2 AB/Swedish IP Network DNS/IP Registry LIR/Local Internet Registry Borgarfjordsgatan 16 Box 62 S-16494 Kista SWEDEN phone: +46 8 5626 40 00 fax-no: +46 8 5626 42 10 e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com remarks: The database object describes the staff of SWIPNET LIR. admin-c: NEKA-RIPE admin-c: ROSI3-RIPE tech-c: NEKA-RIPE tech-c: ROSI3-RIPE nic-hdl: SWIP-RIPE mnt-by: SWIPNET-LIR-MNT notify: firstname.lastname@example.org created: 2002-03-21T14,25,04Z last-modified: 2016-10-20T10,01,27Z source: RIPE person: Tom Hall address: Netigrate AB address: Ebbe Lieberathsgatan 18C address: 412 65 Goteborg address: Sweden e-mail: email@example.com phone: +46 31 7340401 fax-no: +46 31 7340402 nic-hdl: TH2068-RIPE created: 2005-11-03T07,43,19Z last-modified: 2016-04-06T23,24,47Z mnt-by: RIPE-NCC-LOCKED-MNT source: RIPE route6: 2001,67c,3c,,/48 descr: TELE2/ SWIPNET descr: TELE2-NETIGRATE 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: 2015-03-30T07,56,06Z last-modified: 2015-03-30T07,56,06Z 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.