inet6num: 2001,7b8,20e,,/48 netname: NL-BIT6-NBIP descr: IPv6 customer allocation for NBIP country: NL admin-c: BIT-RIPE tech-c: BIT-RIPE mnt-by: BIT-MNT status: ALLOCATED-BY-LIR created: 2013-11-20T16,24,17Z last-modified: 2013-11-20T16,24,17Z source: RIPE role: BIT B.V. Technical Role Account address: BIT B.V. address: Galileilaan 19 address: 6716 BP EDE address: The Netherlands phone: +31 318 648688 fax-no: +31 318 643334 e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: AB2298-RIPE admin-c: TEUN-RIPE tech-c: AB2298-RIPE tech-c: TEUN-RIPE nic-hdl: BIT-RIPE remarks: Please send abuse complaints ONLY to email@example.com remarks: Technical issues can be directed to firstname.lastname@example.org remarks: Peering requests go to email@example.com remarks: Peering details can be found at http,//noc.bit.nl mnt-by: BIT-MNT created: 1970-01-01T00,00,00Z last-modified: 2013-05-21T08,36,47Z source: RIPE route6: 2001,7b8,,/29 descr: NL-BIT-20020405 descr: BIT bv, The Netherlands origin: AS12859 notify: firstname.lastname@example.org mnt-by: BIT-MNT created: 2015-05-15T07,47,08Z last-modified: 2015-05-15T07,47,08Z 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.