AS10197 Chonnam National University
2402:1::/36 - KREN
inet6num: 2402::/22 netname: KREN descr: Korean Education Network country: KR admin-c: IM70-AP tech-c: IM70-AP status: ALLOCATED PORTABLE mnt-by: MNT-KRNIC-AP mnt-irt: IRT-KRNIC-KR last-modified: 2019-04-18T08:21:44Z source: APNIC person: IP Manager address: Seoul Gwanak-gu Gwanak-ro country: KR phone: +82-2-880-5364 e-mail: firstname.lastname@example.org nic-hdl: IM70-AP mnt-by: MNT-KRNIC-AP last-modified: 2017-01-03T07:36:24Z source: APNIC irt: IRT-KRNIC-KR address: Seocho-ro 398, Seocho-gu, Seoul, Korea e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: IM574-AP tech-c: IM574-AP auth: # Filtered mnt-by: MNT-KRNIC-AP last-modified: 2017-10-19T07:36:36Z 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.