163.166.134.0/24

inetnum:        163.166.0.0 - 163.166.255.255
netname:        BAWNET2
descr:          British Airways PLC
country:        GB
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         LEGACY
notify:         eBiz.Reports@britishairways.com
remarks:        Please report abuse at 'abuse@ba.com'
mnt-by:         AS5462-MNT
mnt-by:         AS5089-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2016-02-11T15:33:19Z
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.