188.208.143.0/24

inetnum:        188.208.143.0 - 188.208.143.255
netname:        PT188-208-143-0-24
country:        PT
admin-c:        IT2168-RIPE
tech-c:         IT2168-RIPE
status:         ASSIGNED PA
mnt-by:         in-leapswitch-1-mnt
mnt-by:         MNT-ALMOUROLTEC
created:        2017-06-12T07:53:52Z
last-modified:  2017-06-12T07:53:52Z
source:         RIPE

person:         Ishan Talathi
address:        1, Sneh Classics, 7/1 Erandwane
address:        Nal Stop
address:        Pune
address:        Maharashtra,411004
address:        IN
phone:          +9102032670900
e-mail:         info@whynotavps.com
nic-hdl:        IT2168-RIPE
notify:         ripe-mntner@hetzner.com
mnt-by:         HOS-GUN
created:        2013-10-18T07:29:15Z
last-modified:  2019-02-28T07:27:10Z
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.