inet6num: 2a02,2248,0,2,,/64 netname: SERVERFARM_GCN6 descr: Server Farm of Global Communication Net Plc country: BG admin-c: SB4278-RIPE tech-c: VI291-RIPE status: ASSIGNED mnt-by: GlobalComNet mnt-lower: GlobalComNet mnt-routes: GlobalComNet created: 2011-02-04T15,08,58Z last-modified: 2011-02-04T15,08,58Z source: RIPE person: Shterio Stefanov Badalov address: Global Communication Net EAD address: bul."Kiril and Metodii" 46 address: 1142 Sofia address: Bulgaria phone: +35924800855 fax-no: +35924800851 e-mail: email@example.com nic-hdl: SB4278-RIPE created: 2004-11-15T12,36,35Z last-modified: 2011-01-14T13,29,26Z source: RIPE mnt-by: GlobalComNet notify: firstname.lastname@example.org person: Viliyana Ivanova address: Global Communication Net EAD address: 8 Primorski Polk 128 address: Varna address: Bulgaria phone: +359 52 920021 e-mail: email@example.com nic-hdl: VI291-RIPE created: 2005-12-01T14,20,20Z last-modified: 2012-07-07T20,14,54Z source: RIPE mnt-by: GlobalComNet notify: firstname.lastname@example.org route6: 2a02,2248,0,2,,/64 descr: Server Farm of Global Communication Net Plc origin: AS12615 mnt-lower: GlobalComNet mnt-routes: GlobalComNet mnt-by: GlobalComNet created: 2011-02-04T15,08,58Z last-modified: 2011-02-04T15,08,58Z 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.