inet6num: 2a0b,5400,1,,/48 netname: CH-SWISSNODE-INIT7-1V6 country: CH admin-c: CCS167-RIPE tech-c: GVB145-RIPE status: ALLOCATED-BY-LIR mnt-by: ch-swissnode-1-mnt created: 2016-08-22T18,59,14Z last-modified: 2017-07-29T21,11,49Z source: RIPE person: COPYSAN COMUNICACIONES S.L address: Pol. Industrial Mutilva Baja C/E E1 2 Planta address: 31192 Mutilva Baja address: Spain phone: +34 948 29 13 31 nic-hdl: CCS167-RIPE mnt-by: ch-swissnode-1-mnt created: 2017-07-29T20,45,22Z last-modified: 2017-07-29T20,45,22Z source: RIPE person: Gregor von Bergen address: Swiss Post Box, 6201, Zurcherstrasse 161 address: 8010 address: Zurich address: SWITZERLAND phone: +41763228808 nic-hdl: GVB145-RIPE mnt-by: ch-swissnode-1-mnt created: 2016-08-19T10,47,39Z last-modified: 2016-08-22T18,39,17Z source: RIPE route6: 2a0b,5400,1,,/48 origin: AS13030 mnt-by: ch-swissnode-1-mnt created: 2016-09-23T16,03,57Z last-modified: 2017-03-26T18,57,55Z 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.