31.31.224.0/19

inetnum:        31.31.224.0 - 31.31.255.255
netname:        CZ-SATT-20110321
country:        CZ
org:            ORG-Sa851-RIPE
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         SATT-MNT
mnt-routes:     SATT-MNT
notify:         sobola@satt.cz
created:        2011-03-21T09:46:41Z
last-modified:  2019-10-02T13:33:49Z
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:        ****************************


organisation:   ORG-Sa851-RIPE
org-name:       SATT a.s.
org-type:       LIR
e-mail:         unread@ripe.net
abuse-c:        AR14464-RIPE
mnt-ref:        SATT-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         SATT-MNT
created:        2010-12-02T10:53:09Z
last-modified:  2019-10-02T13:33:49Z
source:         RIPE
address:        Dummy address for ORG-Sa851-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.