AS132172 Fiscal Policy Office
2001:df2:dc00::/48 - FPO-TH
inet6num: 2001:df2:dc00::/48 netname: FPO-TH descr: Fiscal Policy Office descr: Soi AreeSampan Praram VI Rd. Samsennai Payathai country: TH org: ORG-FPO1-AP admin-c: FPON1-AP tech-c: FPON1-AP mnt-routes: MAINT-FPO-TH mnt-irt: IRT-FPO-TH mnt-by: APNIC-HM status: ASSIGNED PORTABLE last-modified: 2018-01-24T12:59:06Z 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.