146.101.79.0/24

inetnum:        146.101.0.0 - 146.101.255.255
netname:        PSINET-EUROPE-HOSTING
descr:          Telstra Dedicated Hosting
descr:          (Was originally PSINET/UKNet / EUNet GB Space)
country:        GB
status:         LEGACY
admin-c:        PR816-RIPE
tech-c:         PNOC4-RIPE
abuse-c:        TIAT2-RIPE
mnt-by:         PSINET-UK-SYSADMIN
mnt-routes:     PSINET-MNT
created:        2002-08-16T17:36:20Z
last-modified:  2019-12-04T13:11:23Z
source:         RIPE
abuse-email:    abuse@intl.telstra.com
abuse-c:        TIAT2-RIPE
abuse-org:      ORG-IANA1-RIPE

role:           Telstra International Network Operations
address:        Telstra Global
address:        The Blue Fin Building, Level 2, 110 Southwark Street SE1 0TA London United Kingdom
address:        GB
phone:          +44 207 965 8888
fax-no:         +44 207 965 5646
e-mail:         network-ripe@uk.telstra.com
remarks:        Please send reports about UBM to abuse@intl.telstra.com
admin-c:        PR816-RIPE
tech-c:         PR816-RIPE
abuse-mailbox:  abuse@intl.telstra.com
nic-hdl:        PNOC4-RIPE
mnt-by:         PSINET-MNT
created:        2004-09-16T13:24:43Z
last-modified:  2019-09-24T15:56:10Z
source:         RIPE

role:           PSINet RIPE-DB
address:        Telstra Global
address:        The Blue Fin Building, Level 2, 110 Southwark Street SE1 0TA London United Kingdom
address:        GB
phone:          +44 20 7965 5800
fax-no:         +44 20 7858 8801
e-mail:         ripe-lir-contacts@uk.telstra.com
admin-c:        LD127-RIPE
tech-c:         LD127-RIPE
abuse-mailbox:  abuse@intl.telstra.com
nic-hdl:        PR816-RIPE
notify:         ripe-notify@uk.telstra.com
mnt-by:         PSINET-MNT
created:        2002-06-14T11:33:38Z
last-modified:  2019-09-24T15:49:35Z
source:         RIPE

route:          146.101.0.0/16
descr:          PSINet UK Dedicated Hosting
remarks:        (Was originally UKNet / EUNet GB space)
origin:         AS12471
mnt-by:         PSINET-MNT
created:        2002-08-16T17:36:21Z
last-modified:  2010-04-16T14:15:58Z
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.