188.8.131.52/21 - BST
inetnum: 184.108.40.206 - 220.127.116.11 netname: BST descr: UAB Biuro sprendimu tinklas country: LT admin-c: BA6357-RIPE tech-c: BA6357-RIPE status: ASSIGNED PA mnt-by: TELECOMLT-MNT created: 2005-03-21T12:18:23Z last-modified: 2016-08-10T05:37:13Z source: RIPE role: BST Admin address: UAB BST address: Savanoriu 178F, Vilnius address: Lithuania e-mail: email@example.com admin-c: LTIN3-RIPE tech-c: LTIN3-RIPE nic-hdl: BA6357-RIPE mnt-by: TELECOMLT-MNT created: 2016-08-10T05:34:59Z last-modified: 2016-08-10T05:34:59Z source: RIPE abuse-mailbox: firstname.lastname@example.org route: 18.104.22.168/22 descr: BST-NET origin: AS43463 mnt-by: AS8764-MNT created: 2011-03-31T13:06:59Z last-modified: 2011-03-31T13:06:59Z source: RIPE route: 22.214.171.124/22 descr: LT-TELEKOMAS origin: AS8764 mnt-by: AS8764-MNT created: 2011-03-31T13:08:29Z last-modified: 2011-03-31T13:08:29Z source: RIPE
IP address subranges within this IP range
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.