2407:a180:1::/48 - Ningnet
inet6num: 2407:a180::/32 netname: Ningnet descr: PT. Bali Ning descr: Ning Internet descr: Ruko Ningnet, Jl. Raya Sading, descr: Kelurahan Sading, Kec. Mengwi, descr: Kab. Badung descr: Bali - Indonesia admin-c: IGP2-AP tech-c: IGC2-AP remarks: Send Spam & Abuse report to email@example.com country: ID mnt-by: MNT-APJII-ID mnt-lower: MAINT-ID-NINGNET mnt-irt: IRT-NINGNET-ID status: ALLOCATED PORTABLE last-modified: 2016-10-27T10:04:44Z 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.