103.29.172.0/23

inetnum:        103.29.172.0 - 103.29.173.255
netname:        CONNECTIVITYIT-AU
descr:          Anycast Networks
country:        AU
admin-c:        ANN5-AP
tech-c:         ANN5-AP
abuse-c:        AE440-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-EYEMEDIA-AU
mnt-irt:        IRT-EYEMEDIA-AU
last-modified:  2021-01-15T05:40:03Z
source:         APNIC

irt:            IRT-EYEMEDIA-AU
address:        Suite 16, 96 Manchester Rd, Mooroolbark, VIC, 3138, AU, Earth
e-mail:         noc@eyemedia.net.au
abuse-mailbox:  abuse@eyemedia.net.au
admin-c:        ANN5-AP
tech-c:         ANN5-AP
auth:           # Filtered
mnt-by:         MAINT-EYEMEDIA-AU
last-modified:  2021-01-15T05:39:17Z
source:         APNIC

role:           ABUSE EYEMEDIAAU
address:        Suite 16, 96 Manchester Rd, Mooroolbark, VIC, 3138, AU, Earth
country:        ZZ
phone:          +000000000
e-mail:         noc@eyemedia.net.au
admin-c:        ANN5-AP
tech-c:         ANN5-AP
nic-hdl:        AE440-AP
remarks:        Generated from irt object IRT-EYEMEDIA-AU
abuse-mailbox:  abuse@eyemedia.net.au
mnt-by:         APNIC-ABUSE
last-modified:  2021-01-15T05:40:02Z
source:         APNIC

role:           Anycast Networks NOC
address:        Level 1 5/15 Phoenix Street, Warragul
country:        AU
phone:          +61356224600
e-mail:         noc@anycast.com.au
admin-c:        ANN5-AP
tech-c:         ANN5-AP
nic-hdl:        ANN5-AP
mnt-by:         MAINT-EYEMEDIA-AU
last-modified:  2017-01-20T01:19:42Z
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.