inetnum: 184.108.40.206 - 220.127.116.11 netname: PT-IST org: ORG-IST11-RIPE sponsoring-org: ORG-FpaC1-RIPE descr: Instituto Superior Tecnico country: PT geoloc: 38.735917 -9.138554 admin-c: RCIS5-RIPE tech-c: RCIS5-RIPE remarks: SERVIP-ULISBOA-IST status: LEGACY mnt-by: RIPE-NCC-LEGACY-MNT mnt-by: AS1930-MNT mnt-lower: AS1930-MNT mnt-routes: AS1930-MNT mnt-domains: AS1930-MNT mnt-irt: IRT-RCTS-CERT created: 2005-02-18T14,43,22Z last-modified: 2017-03-05T11,57,07Z source: RIPE organisation: ORG-IST11-RIPE org-name: Instituto Superior Tecnico org-type: OTHER address: Av.Rovisco Pais, 1 address: 1049-001 Lisboa address: PORTUGAL phone: +351 218417000 e-mail: firstname.lastname@example.org admin-c: RCIS5-RIPE tech-c: RCIS5-RIPE remarks: SERVIP-ULISBOA-IST remarks: Legacy Agreement mnt-by: AS1930-MNT mnt-ref: AS1930-MNT abuse-c: FST8-RIPE abuse-mailbox: email@example.com created: 2016-10-04T07,38,27Z last-modified: 2016-10-06T10,08,40Z source: RIPE role: RCTS Contacts Instituto Superior Tecnico - ULISBOA address: Av.Rovisco Pais, 1 address: 1049-001 Lisboa address: PORTUGAL e-mail: firstname.lastname@example.org admin-c: VL1045-RIPE tech-c: CM1681-RIPE tech-c: JDSM1-RIPE tech-c: JP8810-RIPE tech-c: IL1764-RIPE mnt-by: AS1930-MNT nic-hdl: RCIS5-RIPE created: 2016-10-04T07,32,14Z last-modified: 2016-10-04T07,32,14Z source: RIPE route: 18.104.22.168/24 descr: PT-IST origin: AS1930 mnt-by: AS1930-MNT created: 2016-10-20T23,13,54Z last-modified: 2016-10-20T23,13,54Z source: RIPE
IP Addresses in this 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.