203.167.142.0/23

inetnum:        203.167.128.0 - 203.167.159.255
netname:        CLIX-CLEARNET-ACCESS-NZ
descr:          CLEAR Communications Ltd
descr:          Broadband Access Networks
country:        NZ
admin-c:        VAC1-AP
tech-c:         VAC1-AP
remarks:        Delegated by CLEAR Communications Ltd, Auckland, New Zealand
remarks:        24/7 CLEAR NOC phone +64 9 912-4990
notify:         apnic.changes@team.telstraclear.co.nz
mnt-by:         MAINT-NZ-TELSTRACLEAR
status:         ASSIGNED NON-PORTABLE
changed:        david.robb@vodafone.com 20170808
mnt-irt:        IRT-VODAFONE-NZ
source:         APNIC

irt:            IRT-VODAFONE-NZ
address:        Smales Farm
address:        74 Taharoto Road Takapuna
address:        Auckland 0622 New Zealand
e-mail:         hostmaster@vodafone.co.nz
abuse-mailbox:  abuse.nz@vodafone.com
admin-c:        VAC1-AP
tech-c:         VAC1-AP
auth:           # Filtered
mnt-by:         MAINT-NZ-VODAFONE-NZ
changed:        david.robb@vodafone.com 20170821
source:         APNIC

role:           VFNZ Admin contacts
address:        Vodafone NZ Private Bag 92161 Auckland 1030 New Zealand
country:        NZ
phone:          +64-9-355-2000
e-mail:         noc.nz@vodafone.com
admin-c:        NOC-VFNZ
admin-c:        DR391-AP
admin-c:        NL446-AP
tech-c:         NOC-VFNZ
tech-c:         AE97-AP
tech-c:         DR391-AP
tech-c:         NL446-AP
nic-hdl:        VAC1-AP
mnt-by:         MAINT-NZ-VODAFONE-NZ
changed:        david.robb@vodafone.com 20170801
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.