79.140.200.0/21

inetnum:        79.140.204.0 - 79.140.207.255
netname:        CAPROCK
descr:          caprock-netblk03 ripe assignment #4
country:        GB
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         Assigned PA
mnt-by:         MNT-CPRK
created:        2009-02-07T23:51:42Z
last-modified:  2012-06-27T12:38:23Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************


organisation:   ORG-CUL4-RIPE
org-name:       CapRock UK Ltd
org-type:       LIR
address:        Dummy address for ORG-CUL4-RIPE
e-mail:         unread@ripe.net
mnt-ref:        MNT-CPRK
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-CPRK
abuse-c:        AC24658-RIPE
created:        2007-11-07T11:11:11Z
last-modified:  2019-03-20T13:44:57Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************

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.