AS327979 DIAMATRIX C.C
2c0f:f850:dc03::/48 - DNET-DC3
inet6num: 2C0F:F850:DC03:0000::/48 netname: DNET-DC3 descr: DC3 Infrastructure country: ZA admin-c: WD1-AFRINIC admin-c: BS3-AFRINIC tech-c: BS3-AFRINIC status: ASSIGNED PA mnt-by: AFRINIC-HM-MNT notify: ***@diamatrix.co.za changed: ***@diamatrix.co.za 20120807 source: AFRINIC
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.