inetnum: 18.104.22.168 - 22.214.171.124 netname: ietf-meeting-network descr: IETF Meeting Network country: CH org: ORG-IS136-RIPE admin-c: RP8067-RIPE tech-c: RP8067-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: netnod-mnt mnt-routes: ietf-mnt mnt-domains: ietf-mnt notify: firstname.lastname@example.org created: 2011-05-10T10:10:09Z last-modified: 2016-04-14T09:05:54Z source: RIPE sponsoring-org: ORG-NIE1-RIPE organisation: ORG-IS136-RIPE org-name: Internet Society org-type: OTHER address: Galerie Jean-Malbuisson 15, CH-1204 Geneva, Switzerland e-mail: email@example.com abuse-c: AR28097-RIPE mnt-ref: netnod-mnt mnt-by: ietf-mnt created: 2010-11-09T08:26:08Z last-modified: 2014-11-17T22:34:34Z source: RIPE person: Ray Peletier address: Internet Society address: 1775 Wiehle Ave address: Suite 201 address: Reston VA 20190 phone: +1-703-439-2120 nic-hdl: RP8067-RIPE mnt-by: NETNOD-MNT created: 2010-11-09T08:34:33Z last-modified: 2010-11-09T08:34:33Z source: RIPE route: 126.96.36.199/18 descr: IETF Meeting Network origin: AS56554 mnt-by: IETF-MNT created: 2012-11-03T16:35:00Z last-modified: 2012-11-03T16:35:00Z 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.