91.227.28.0/24

inetnum:        91.227.28.0 - 91.227.31.255
netname:        FORTUNA-NET
country:        RU
org:            ORG-FL67-RIPE
admin-c:        UT420-RIPE
tech-c:         UT420-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         FORTUNA-MNT
mnt-by:         SDAMO-MNT
mnt-routes:     FORTUNA-MNT
mnt-routes:     SDAMO-MNT
mnt-domains:    FORTUNA-MNT
mnt-domains:    SDAMO-MNT
created:        2011-05-03T10:11:48Z
last-modified:  2016-04-14T10:38:48Z
source:         RIPE
sponsoring-org: ORG-NGs2-RIPE
abuse-email:    abuse@fortuna-dv.ru
abuse-c:        AR27544-RIPE
abuse-org:      ORG-NGs2-RIPE

organisation:   ORG-FL67-RIPE
org-name:       FORTUNA Ltd
org-type:       OTHER
address:        Vokzalnaya 6
address:        Primorye Territory, 692390, Sibirtsevo Township, Russian Federation
e-mail:         support@fortuna-dv.ru
abuse-c:        AR27544-RIPE
mnt-ref:        FORTUNA-MNT
mnt-by:         FORTUNA-MNT
created:        2011-04-20T06:59:46Z
last-modified:  2020-04-29T08:07:47Z
source:         RIPE

person:         Unkevitch Taras
address:        Vokzalnaya 6
address:        Primorye Territory, 692390, Sibirtsevo Township
phone:          +79084639039
phone:          +79140699171
nic-hdl:        UT420-RIPE
mnt-by:         FORTUNA-MNT
created:        2011-04-20T06:51:49Z
last-modified:  2011-05-16T11:16:19Z
source:         RIPE

route:          91.227.28.0/22
descr:          route object
origin:         AS56720
mnt-by:         FORTUNA-MNT
mnt-by:         SDAMO-MNT
created:        2011-05-16T11:16:19Z
last-modified:  2012-01-18T09:34:14Z
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.