AS135586 INTERLINK COMMUNICATION PCL.
2404:b0:1005::/48 - thnic-ipv6-TH
inet6num: 2404:b0:1005::/48 netname: thnic-ipv6-TH descr: THNIC (Thai name server) country: TH admin-c: LIA1-AP tech-c: LIA1-AP status: ASSIGNED NON-PORTABLE mnt-by: LOXINFO-IS mnt-irt: IRT-CSLOXINFO-TH last-modified: 2018-01-29T10:13:51Z source: APNIC
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.