inet6num: 2a03,9700,,/33 netname: SHOCKMEDIAV6-NET1 descr: Shock Media IPv6 Network 1 country: NL admin-c: SHCK-RIPE tech-c: SHCK-RIPE status: AGGREGATED-BY-LIR mnt-routes: PREVIDER-MNT assignment-size: 128 mnt-by: SHOCK-MNT created: 2016-12-23T14,48,03Z last-modified: 2017-09-20T12,47,26Z source: RIPE person: Shock Media B.V. Technical Role address: Twentepoort Oost 18 address: 7609 RG Almelo address: Netherlands phone: +31 546 714360 e-mail: firstname.lastname@example.org nic-hdl: SHCK-RIPE mnt-by: SR77084-MNT created: 2011-04-06T12,16,46Z last-modified: 2013-01-02T09,42,24Z source: RIPE route6: 2a03,9700,,/33 origin: AS20847 mnt-by: PREVIDER-MNT created: 2017-09-20T12,59,44Z last-modified: 2017-09-20T12,59,44Z 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.