AS24475 ThaiREN.Thailand Research and Education Network Thailand
2001:3c8:1012::/48 - UNINET-TH-20020513
inet6num: 2001:3c8::/32 netname: UNINET-TH-20020513 descr: Thailand Education and Research Network remarks: upgraded from /35 country: TH org: ORG-OOIA1-AP admin-c: TS250-AP tech-c: WM107-AP status: ALLOCATED PORTABLE notify: firstname.lastname@example.org mnt-by: APNIC-HM mnt-lower: MAINT-TH-UNINET mnt-irt: IRT-UNINET-TH last-modified: 2017-08-29T23:04:03Z source: APNIC person: Werachart Muttitanon address: 261/255 Charansinitwong Rd, address: Bangkoknoi, country: TH phone: +66-2-248-7749 fax-no: +66-2-248-6662 e-mail: email@example.com nic-hdl: WM107-AP mnt-by: MAINT-NEW last-modified: 2008-09-04T07:29:23Z source: APNIC irt: IRT-UNINET-TH address: 328 Sriayuthaya Rd., address: Payathai,Ratchathewi address: Bangkok e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com admin-c: TS250-AP tech-c: TS250-AP auth: # Filtered mnt-by: MAINT-TH-UNINET last-modified: 2016-04-27T10:55:09Z source: APNIC person: Tawee Sribuddee nic-hdl: TS250-AP e-mail: firstname.lastname@example.org address: 328 Si Ayutthaya Road address: Ratchathewi address: Bangkok phone: +66-2-232-4000 fax-no: +66-2-232-4000 ext.5012 country: TH mnt-by: MAINT-TH-UNINET last-modified: 2017-10-25T09:21:32Z 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.