103.138.245.0/24

inetnum:        103.138.245.0 - 103.138.245.255
netname:        GIGACOMM-AU
descr:          GigaComm Pty Ltd
country:        AU
geoloc:         -33.868831 151.209338
admin-c:        GPL7-AP
tech-c:         GPL7-AP
abuse-c:        AG1069-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-AU-GIGACOMM
mnt-irt:        IRT-GIGACOMM-AU
last-modified:  2021-02-10T07:10:49Z
source:         APNIC


irt:            IRT-GIGACOMM-AU
address:        Level 2, Riverside Quay, 1 Southbank Blvd
e-mail:         sophearom@gigacomm.net.au
abuse-mailbox:  sophearom@gigacomm.net.au
admin-c:        ANPL7-AP
tech-c:         ANPL7-AP
auth:           # Filtered
remarks:        sophearom@gigacomm.net.au was validated on 2021-01-25
mnt-by:         MAINT-AU-GIGACOMM
last-modified:  2021-02-01T05:07:25Z
source:         APNIC

role:           GIGACOMM PTY LTD
address:        P O Box 400, Bentleigh VIC 3204
country:        AU
phone:          +61 427 496 319
e-mail:         sophearom@gigacomm.net.au
admin-c:        GPL7-AP
tech-c:         GPL7-AP
nic-hdl:        GPL7-AP
mnt-by:         MAINT-AU-GIGACOMM
last-modified:  2019-12-03T12:47:06Z
source:         APNIC

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.