General Info




SURFnet bv


AS1103 SURFnet bv



Whois Details

inet6num:         2001,610,,/29
netname:          NL-SURFNET-19990819
country:          NL
org:              ORG-Sb3-RIPE
admin-c:          SNS1-RIPE
tech-c:           SNS1-RIPE
status:           ALLOCATED-BY-RIR
mnt-by:           RIPE-NCC-HM-MNT
mnt-by:           SN-LIR-MNT
mnt-lower:        AS1103-MNT
mnt-lower:        SN-LIR-MNT
mnt-routes:       AS1103-MNT
mnt-routes:       SN-LIR-MNT
created:          2016-08-25T13,01,49Z
last-modified:    2017-06-13T11,26,40Z
source:           RIPE

organisation:     ORG-Sb3-RIPE
org-name:         SURFnet bv
org-type:         LIR
address:          P.O. Box 19035
address:          3501 DA
address:          Utrecht
address:          NETHERLANDS
phone:            +31302305305
fax-no:           +31302305329
admin-c:          HT3384-RIPE
admin-c:          MK512-RIPE
admin-c:          SNS1-RIPE
admin-c:          JK9622-RIPE
admin-c:          RVR19-RIPE
admin-c:          WB311-RIPE
admin-c:          NO17-RIPE
admin-c:          RS957-RIPE
admin-c:          SM12780-RIPE
abuse-c:          SNS1-RIPE
mnt-ref:          RIPE-NCC-HM-MNT
mnt-ref:          SN-LIR-MNT
mnt-by:           RIPE-NCC-HM-MNT
mnt-by:           SN-LIR-MNT
created:          2004-04-17T11,43,29Z
last-modified:    2017-08-24T10,54,39Z
source:           RIPE
remarks:          especially for NCC ticket 2017083952 # 2017083952

role:             SURFnet Network Services
address:          Kantoren Hoog Overborch (Hoog Catharijne)
address:          Moreelsepark 48, 3511 EP Utrecht
address:          Postbus 19035, 3501 DA Utrecht
phone:            +31 88 7873000
admin-c:          JK9622-RIPE
tech-c:           NO17-RIPE
tech-c:           JK9622-RIPE
tech-c:           MK512-RIPE
nic-hdl:          SNS1-RIPE
mnt-by:           AS1103-MNT
created:          2002-07-09T10,06,06Z
last-modified:    2015-02-05T09,00,39Z
source:           RIPE

route6:           2001,610,,/29
descr:            SURFnet IPv6 block
origin:           AS1103
mnt-by:           AS1103-MNT
created:          2016-09-07T13,54,39Z
last-modified:    2016-09-08T12,00,37Z
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.