86.111.232.0/21

inetnum:        86.111.232.0 - 86.111.239.255
netname:        OFFENBACH-NET
country:        DE
org:            ORG-SO12-RIPE
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         AS12312-MNT
mnt-routes:     AS12312-MNT
mnt-domains:    AS12312-MNT
created:        2005-10-03T12:16:43Z
last-modified:  2020-11-16T17:45:51Z
source:         RIPE
sponsoring-org: ORG-ECA1-RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************


organisation:   ORG-SO12-RIPE
org-type:       OTHER
org-name:       Stadtverwaltung Offenbach
address:        Dummy address for ORG-SO12-RIPE
e-mail:         unread@ripe.net
abuse-c:        AR22546-RIPE
mnt-ref:        AS12312-MNT
mnt-by:         AS12312-MNT
created:        2005-04-04T08:24:38Z
last-modified:  2016-09-19T13:01:45Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************

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.