General Info




Universiteit Twente


AS1133 SURFnet bv



Whois Details

inet6num:         2001,67c,2564,,/48
netname:          UTNET-IPv6
country:          NL
org:              ORG-UT18-RIPE
sponsoring-org:   ORG-Sb3-RIPE
admin-c:          GM3191-RIPE
tech-c:           GM3191-RIPE
status:           ASSIGNED PI
mnt-by:           RIPE-NCC-END-MNT
mnt-by:           SN-LIR-MNT
mnt-routes:       AS1103-MNT
mnt-domains:      SN-LIR-MNT
created:          2011-11-04T16,07,03Z
last-modified:    2016-04-14T08,42,34Z
source:           RIPE

organisation:     ORG-UT18-RIPE
org-name:         Universiteit Twente
org-type:         OTHER
descr:            Drienerlolaan 5
descr:            P.O. Box 217
descr:            NL - 7500 AE Enschede
address:          The Netherlands
phone:            +31 53 489 2311
admin-c:          Ins20-RIPE
tech-c:           Ins20-RIPE
mnt-by:           SN-LIR-MNT
mnt-ref:          SN-LIR-MNT
abuse-c:          SNS1-RIPE
created:          2015-05-27T07,46,16Z
last-modified:    2015-05-27T07,46,16Z
source:           RIPE

person:           Gert Meijerink
address:          Universiteit Twente
address:          P.O. Box 217
address:          NL-7500 AE Enschede
address:          The Netherlands
phone:            +31 53 892326
nic-hdl:          GM3191-RIPE
remarks:          This object is no longer maintained by
remarks:          and is or may soon become obsolete.
mnt-by:           SN-LIR-MNT
mnt-by:           SN-LIR-MNT
created:          1970-01-01T00,00,00Z
last-modified:    2001-09-22T07,19,05Z
source:           RIPE

route6:           2001,67c,2564,,/48
descr:            University Twente IPv6
origin:           AS1133
mnt-by:           AS1103-MNT
mnt-routes:       AS1103-MNT
created:          2011-11-11T11,26,32Z
last-modified:    2011-11-11T11,26,32Z
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.