2.18.240.0/24

inetnum:        2.16.0.0 - 2.23.255.255
netname:        EU-AKAMAI-20100910
country:        EU
org:            ORG-AT1-RIPE
admin-c:        NARA1-RIPE
admin-c:        NF1714-RIPE
tech-c:         NARA1-RIPE
tech-c:         NF1714-RIPE
status:         ALLOCATED PA
notify:         ip-admin@akamai.com
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AKAM1-RIPE-MNT
mnt-lower:      AKAM1-RIPE-MNT
mnt-domains:    AKAM1-RIPE-MNT
mnt-routes:     AKAM1-RIPE-MNT
created:        2010-09-10T08:12:33Z
last-modified:  2016-05-27T10:12:41Z
source:         RIPE
abuse-email:    abuse@akamai.com
abuse-c:        AR15028-RIPE
abuse-org:      ORG-AT1-RIPE

organisation:   ORG-AT1-RIPE
org-name:       Akamai International B.V.
org-type:       LIR
address:        8 Cambridge Center
address:        02142
address:        Cambridge, MA
address:        UNITED STATES
phone:          +16174444768
fax-no:         +16174444768
e-mail:         noam@akamai.com
admin-c:        NF1714-RIPE
admin-c:        NARA1-RIPE
admin-c:        CKAK-RIPE
admin-c:        RM4844-RIPE
admin-c:        NB782-RIPE
admin-c:        AKAY-RIPE
abuse-c:        AR15028-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        AKAM1-RIPE-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AKAM1-RIPE-MNT
created:        2004-04-17T11:18:43Z
last-modified:  2019-04-15T17:17:52Z
source:         RIPE

role:           Network Architecture Role Account
address:        Akamai Technologies
address:        8 Cambridge Center
address:        Cambridge, MA 02142
phone:          +1-617-938-3130
e-mail:         ip-admin@akamai.com
abuse-mailbox:  abuse@akamai.com
admin-c:        NF1714-RIPE
admin-c:        CKAK-RIPE
tech-c:         NF1714-RIPE
tech-c:         JP1944-RIPE
tech-c:         APB15-RIPE
tech-c:         CKAK-RIPE
tech-c:         TBAK-RIPE
tech-c:         NB782-RIPE
tech-c:         RM4844-RIPE
tech-c:         AKAY-RIPE
nic-hdl:        NARA1-RIPE
notify:         ip-admin@akamai.com
mnt-by:         AKAM1-RIPE-MNT
created:        2002-03-06T09:02:17Z
last-modified:  2019-04-15T17:17:53Z
source:         RIPE

person:         Noam Freedman
address:        Akamai Technologies
address:        8 Cambridge Center
address:        Cambridge, MA 02142
phone:          +1-617-938-3130
e-mail:         noam+ripe@akamai.com
nic-hdl:        NF1714-RIPE
notify:         noam+ripe@akamai.com
mnt-by:         AKAM1-RIPE-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2017-10-30T21:45:05Z
source:         RIPE

route:          2.16.0.0/13
descr:          Akamai Technologies
origin:         AS34164
mnt-by:         AKAM1-RIPE-MNT
mnt-routes:     AKAM1-RIPE-MNT ANY
mnt-routes:     AS6762-MNT { 2.16.19.0/24^+, 2.16.70.0/23^+, 2.16.146.0/23^+, 2.16.178.0/23^+, 2.16.220.0/22^+, 2.17.124.0/22^+, 2.18.0.0/22^+, 2.18.80.0/20^+, 2.19.16.0/20^+, 2.20.4.0/22^+, 2.20.224.0/20^+, 2.20.252.0/24^+, 2.21.14.0/24^+, 2.21.99.0/24^+, 2.21.108.0/22^+, 2.22.20.0/23^+, 2.23.16.0/20^+, 2.23.112.0/20^+ }
mnt-routes:     CW-EUROPE-GSOC { 2.16.35.0/24^+, 2.16.148.0/23^+, 2.16.152.0/24^+, 2.22.44.0/22^+, 2.22.51.0/24^+, 2.22.248.0/23^+, 2.23.192.0/20^+, 2.23.208.0/20^+ }
mnt-routes:     TDATANET-RR { 2.16.72.0/23^+, 2.19.160.0/20^+ }
mnt-routes:     ELISA-MNT { 2.16.144.0/23^+, 2.19.0.0/20^+, 2.20.0.0/22^+ }
mnt-routes:     AS8708-MNT { 2.17.116.0/22^+, 2.20.96.0/19^+ }
mnt-routes:     TELIANET-RR { 2.17.140.0/22^+, 2.22.36.0/22^+, 2.22.40.0/22^+, 2.22.63.0/24^+, 2.22.238.0/23^+, 2.23.128.0/20^+ }
mnt-routes:     AS1267-MNT { 2.17.240.0/21^+, 2.21.164.0/22^+ }
mnt-routes:     RTNET-MNT { 2.18.4.0/22^+ }
mnt-routes:     AS3257-ROUTE-MNT { 2.20.48.0/24^+ }
mnt-routes:     ETISALAT-MNT { 2.20.249.0/24^+, 2.21.231.0/24^+ }
mnt-routes:     AS3292-MNT { 2.21.28.0/22^+ }
mnt-routes:     TE-Data-MNT { 2.21.128.0/22^+ }
mnt-routes:     AS12400-MNT { 2.22.233.0/24^+ }
mnt-routes:     QTEL-NOC { 2.23.224.0/19^+ }
created:        2014-05-18T17:33:42Z
last-modified:  2020-05-27T03:50:29Z
source:         RIPE

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.