145.131.16.0/20

inetnum:        145.131.16.0 - 145.131.31.255
org:            ORG-AB221-RIPE
descr:          Argeweb B.V.
abuse-c:        ACRO16924-RIPE
netname:        ARGEWEB
status:         ASSIGNED PA
remarks:        abuse-mailbox: abuse@argeweb.nl
country:        NL
admin-c:        PB8076-RIPE
tech-c:         PB8076-RIPE
tech-c:         AMSI2-RIPE
notify:         network@pcextreme.nl
mnt-by:         PCEXTREME-MNT
created:        2016-06-22T08:34:22Z
last-modified:  2020-08-24T16:20:13Z
source:         RIPE
abuse-email:    abuse@argeweb.nl
abuse-c:        ACRO16924-RIPE
abuse-org:      ORG-AB221-RIPE

organisation:   ORG-AB221-RIPE
org-name:       Argeweb BV
org-type:       OTHER
address:        Noordzee 10D
address:        3144DB Maassluis
e-mail:         support@argeweb.nl
abuse-c:        ACRO16924-RIPE
mnt-ref:        AMSIO-MNT
mnt-ref:        PCEXTREME-MNT
mnt-by:         AMSIO-MNT
mnt-by:         SENTIA-MNT
mnt-by:         PCEXTREME-MNT
created:        2018-06-14T12:20:03Z
last-modified:  2020-08-24T16:19:48Z
source:         RIPE

role:           NL-AMSIO NOC
address:        Noordzee 10A
address:        3144 DB Maassluis
address:        The Netherlands
e-mail:         noc@amsio.com
nic-hdl:        AMSI2-RIPE
mnt-by:         NLAMSIO-MNT
created:        2015-08-18T12:07:19Z
last-modified:  2015-08-18T12:19:43Z
source:         RIPE
abuse-mailbox:  abuse@amsio.com
admin-c:        RvdZ8-RIPE
admin-c:        OvdL5-RIPE
tech-c:         RvdZ8-RIPE
tech-c:         OvdL5-RIPE

role:           PCextreme BV
phone:          +31207009919
tech-c:         PGN24-RIPE
address:        Edisonweg 51D
address:        4382NV Vlissingen
address:        The Netherlands
e-mail:         support@pcextreme.nl
abuse-mailbox:  abuse@pcextreme.nl
nic-hdl:        PB8076-RIPE
mnt-by:         PCEXTREME-MNT
created:        2007-03-22T22:51:48Z
last-modified:  2020-08-10T10:45:42Z
source:         RIPE

route:          145.131.16.0/20
descr:          Argeweb
origin:         AS8315
mnt-by:         SENTIA-MNT
mnt-by:         PCEXTREME-MNT
created:        2016-06-22T11:23:27Z
last-modified:  2020-02-10T14:56:33Z
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.