220.127.116.11/21 - IE-ATLANTEKLTD-20110413
inetnum: 18.104.22.168 - 22.214.171.124 netname: IE-ATLANTEKLTD-20110413 country: IE org: ORG-ACTL2-RIPE admin-c: AM20046-RIPE tech-c: AM20046-RIPE status: ALLOCATED PA mnt-by: RIPE-NCC-HM-MNT mnt-lower: MNT-ATLANTEK mnt-routes: MNT-ATLANTEK notify: email@example.com created: 2011-04-13T11:46:14Z last-modified: 2016-04-14T09:50:16Z source: RIPE organisation: ORG-ACTL2-RIPE org-name: Atlantek Computers Teoranta Ltd org-type: LIR address: Rossport address: Ballina address: Co Mayo address: IRELAND phone: +3539782255 fax-no: +3539782255 e-mail: firstname.lastname@example.org abuse-c: AR15504-RIPE mnt-ref: MNT-ATLANTEK mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT created: 2010-10-15T11:56:45Z last-modified: 2015-03-26T10:00:42Z source: RIPE person: Alan McGrath address: Rossport address: Ballina address: Co Mayo phone: +3539782255 e-mail: email@example.com nic-hdl: AM20046-RIPE mnt-by: MNT-ATLANTEK created: 2011-04-13T10:12:13Z last-modified: 2011-04-13T10:12:13Z source: RIPE route: 126.96.36.199/21 descr: Atlantek Computers origin: AS49221 mnt-by: MNT-ATLANTEK created: 2011-08-27T11:30:27Z last-modified: 2015-04-17T12:51:27Z 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.