inet6num: 2001,4de0,2300,,/40 netname: HIGHWINDS-MIAMI-IPV6 descr: Highwinds IPv6 Aggregate (Miami, FL, USA) country: US admin-c: HWNG-RIPE tech-c: HWNG-RIPE status: ASSIGNED mnt-by: EWEKA-MNT created: 2016-10-12T13,44,51Z last-modified: 2016-10-12T13,44,51Z source: RIPE role: Highwinds Network Group address: 3300 N Central Ave address: Ste 200 address: 85012 Phoenix, AZ USA e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com admin-c: HNGN1-RIPE tech-c: HNGN1-RIPE nic-hdl: HWNG-RIPE created: 2007-05-21T19,36,37Z last-modified: 2011-09-26T19,14,48Z source: RIPE mnt-by: HWNG-MNT route6: 2001,4de0,,/32 descr: Highwinds Network Group Inc origin: AS12989 mnt-by: HWNG-MNT created: 2006-03-27T22,05,24Z last-modified: 2008-06-25T13,51,27Z 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.