144.177.72.0/24

inetnum:        144.177.0.0 - 144.177.255.255
netname:        AKNET-2
descr:          AKER SOLUTIONS ASA
descr:          P.O.BOX 169
descr:          LYSAKER
descr:          N-1325
country:        NO
admin-c:        ABSR2-RIPE
tech-c:         ABSR2-RIPE
status:         LEGACY
mnt-by:         MNT-ABS
mnt-lower:      MNT-ABS
mnt-lower:      MNT-ABS
mnt-routes:     MNT-ABS
created:        2003-12-09T13:47:32Z
last-modified:  2020-10-09T10:12:02Z
source:         RIPE

person:         Cognizant oil and gas RIPEADMIN
address:        Snaroyveien 36
phone:          +47 67 59 50 00
nic-hdl:        ABSR2-RIPE
e-mail:         harry.bakke@cognizantog.com
mnt-by:         MNT-ABS
created:        2012-10-03T14:01:42Z
last-modified:  2018-12-28T16:32:20Z
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.