185.133.26.0/23

inetnum:        185.133.24.0 - 185.133.27.255
netname:        DE-CROSSCONCEPT-20151228
country:        DE
org:            ORG-CG152-RIPE
admin-c:        DS18267-RIPE
tech-c:         DS18267-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         de-crossconcept-1-mnt
mnt-lower:      de-crossconcept-1-mnt
mnt-routes:     de-crossconcept-1-mnt
created:        2015-12-28T14:31:11Z
last-modified:  2016-05-31T17:11:58Z
source:         RIPE
abuse-email:    abuse@crossconcept.net
abuse-c:        AR34817-RIPE
abuse-org:      ORG-CG152-RIPE

organisation:   ORG-CG152-RIPE
org-name:       crossconcept GmbH
org-type:       LIR
address:        Saarlandstr. 124a
address:        44139
address:        Dortmund
address:        GERMANY
phone:          +49 2314278680
fax-no:         +49 23142786820
e-mail:         hostmaster@crossconcept.net
admin-c:        DS18267-RIPE
tech-c:         DS18267-RIPE
abuse-c:        AR34817-RIPE
mnt-ref:        de-crossconcept-1-mnt
mnt-by:         RIPE-NCC-HM-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         de-crossconcept-1-mnt
created:        2015-12-28T12:51:55Z
last-modified:  2016-06-14T07:50:11Z
source:         RIPE

person:         Daniel Speicher
e-mail:         hostmaster@crossconcept.net
org:            ORG-CG152-RIPE
address:        crossconcept GmbH
address:        Saarlandstr. 124a
address:        44139
address:        Dortmund
address:        GERMANY
phone:          +49 2314278680
nic-hdl:        DS18267-RIPE
mnt-by:         de-crossconcept-1-mnt
created:        2015-12-28T12:51:54Z
last-modified:  2016-06-11T09:44:08Z
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.