inet6num: 2a03,d000,9000,,/48 netname: MF-MEGALABS descr: OJSC Megalabs country: RU org: ORG-CM35-RIPE admin-c: NMNW-RIPE admin-c: AVA74-RIPE tech-c: NMNW-RIPE tech-c: AVA74-RIPE status: ASSIGNED notify: firstname.lastname@example.org mnt-by: MEGAFON-RIPE-MNT created: 2016-08-29T15,06,30Z last-modified: 2016-08-29T15,06,30Z source: RIPE organisation: ORG-CM35-RIPE org-name: CJSC Megalabs org-type: OTHER address: Alexey Agaryov address: 40/4, Bolshaya Ordynka str. address: 119017 Moscow address: RUSSIAN FEDERATION phone: +74997550080 fax-no: +74997550081 e-mail: email@example.com abuse-c: AR29761-RIPE mnt-ref: MEGAFON-RIPE-MNT mnt-by: MEGAFON-RIPE-MNT admin-c: AVA74-RIPE tech-c: AVA74-RIPE created: 2012-06-27T14,14,57Z last-modified: 2014-11-17T22,44,17Z source: RIPE role: North-West Branch of OJSC MegaFon Internet Center address: 10, Karavannaya street address: Saint-Petersburg, Russia, 191011 e-mail: firstname.lastname@example.org notify: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: MFON-RIPE tech-c: MFON-RIPE nic-hdl: NMNW-RIPE mnt-by: MEGAFON-RIPE-MNT mnt-by: MEGAFON-GNOC-MNT mnt-by: MEGAFON-WEST-MNT mnt-by: MNT-MF-NWGSM created: 2004-10-18T10,50,01Z last-modified: 2016-10-13T13,26,23Z source: RIPE person: Alexey V Agaryov address: 32a, Lenynsky avenu, Moscow Russia remarks: phone, +7 095 3636240 phone: +7 495 3636240 remarks: fax-no, +7 095 3636240 fax-no: +7 495 3636240 e-mail: email@example.com e-mail: firstname.lastname@example.org e-mail: email@example.com nic-hdl: AVA74-RIPE notify: firstname.lastname@example.org mnt-by: MNT-DOMOLAN mnt-by: BSH-MNT created: 2002-09-05T10,18,38Z last-modified: 2010-08-06T11,37,47Z source: RIPE remarks: modified for Russian phone area changes route6: 2a03,d000,9000,,/48 descr: OJSC Megalabs origin: AS13075 mnt-by: MEGAFON-RIPE-MNT created: 2016-08-29T15,07,19Z last-modified: 2016-08-29T15,07,19Z 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.