inet6num: 2a04,42c0,,/29 netname: UA-UKRCOM-20130620 country: UA org: ORG-SE1-RIPE admin-c: ANK32-RIPE tech-c: UHUB-RIPE status: ALLOCATED-BY-RIR notify: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: YZ42-RIPE-MNT mnt-lower: YZ42-RIPE-MNT mnt-routes: YZ42-RIPE-MNT created: 2013-06-20T11,11,45Z last-modified: 2016-06-13T10,32,09Z source: RIPE organisation: ORG-SE1-RIPE org-name: Ukrcom Ltd. org-type: LIR address: 3-floor, 15, Simyi Khokhlovykh str. address: 04119 address: Kiev address: UKRAINE phone: +380442055514 fax-no: +380442055599 e-mail: firstname.lastname@example.org admin-c: ANK32-RIPE admin-c: YZ42-RIPE abuse-c: AR17462-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: YZ42-RIPE-MNT abuse-mailbox: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: YZ42-RIPE-MNT created: 2004-04-17T12,09,57Z last-modified: 2016-10-06T15,23,20Z source: RIPE person: Andrey N. Kobluk address: Ukraine, 0419, Kiev, S. Hohlovih 15, fl.3 phone: +3 (8044) 2055572 e-mail: firstname.lastname@example.org nic-hdl: ANK32-RIPE notify: email@example.com mnt-by: YZ42-RIPE-MNT created: 2003-02-18T11,36,58Z last-modified: 2015-02-09T10,17,04Z source: RIPE person: Koblyuk Andrei address: vul. S. Khokhlovyh, 15 address: Kiev, Ukraine, 04050 phone: +380 44 2055570 e-mail: firstname.lastname@example.org nic-hdl: UHUB-RIPE notify: email@example.com mnt-by: YZ42-RIPE-MNT created: 2007-05-10T07,08,53Z last-modified: 2007-05-10T07,08,53Z source: RIPE route6: 2a04,42c0,,/29 descr: Ukrcom, Ltd. origin: AS12593 mnt-by: YZ42-RIPE-MNT created: 2014-07-21T07,22,02Z last-modified: 2014-07-21T07,22,02Z 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.