18.104.22.168/21 - SPNET
inetnum: 22.214.171.124 - 126.96.36.199 netname: SPNET descr: Spectrum NET Ltd., Sofia country: BG admin-c: TD939-RIPE tech-c: TD939-RIPE status: ASSIGNED PA notify: firstname.lastname@example.org mnt-by: SPNET-MNT created: 2007-01-09T16:04:10Z last-modified: 2010-09-14T14:17:44Z source: RIPE person: Bisser Hadjimarkov address: Mobiltel EAD address: 1 Kukush str. address: BG 1309 Sofia address: Bulgaria phone: +359 2 4891027 fax-no: +359 2 9657646 e-mail: email@example.com abuse-mailbox: RIPE.Abuse@mobiltel.bg nic-hdl: TD939-RIPE mnt-by: MOBILTEL-MNT created: 2004-12-13T11:22:41Z last-modified: 2016-04-21T11:26:22Z 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.