SURFnet BV

IPv4 IPv6
Country Netherlands Netherlands
Assigned AS N/A
Updated 02 September 2026

We found 50 IPv4 networks operated by this organization.
Results sorted by network size.

Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB100
CIDR: 145.104.0.0/16
IP Range: 145.104.0.0 - 145.104.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB101
CIDR: 145.105.0.0/16
IP Range: 145.105.0.0 - 145.105.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SPEELTUIN-NET
CIDR: 145.111.0.0/16
IP Range: 145.111.0.0 - 145.111.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB108
CIDR: 145.112.0.0/16
IP Range: 145.112.0.0 - 145.112.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB109
CIDR: 145.113.0.0/16
IP Range: 145.113.0.0 - 145.113.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB110
CIDR: 145.114.0.0/16
IP Range: 145.114.0.0 - 145.114.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB111
CIDR: 145.115.0.0/16
IP Range: 145.115.0.0 - 145.115.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB117
CIDR: 145.121.0.0/16
IP Range: 145.121.0.0 - 145.121.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB119
CIDR: 145.123.0.0/16
IP Range: 145.123.0.0 - 145.123.255.255
Block size: 65,536
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET-BLOCKB123
CIDR: 145.127.0.0/16
IP Range: 145.127.0.0 - 145.127.255.255
Block size: 65,536
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUVPN-NET
CIDR: 145.90.32.0/19
IP Range: 145.90.32.0 - 145.90.63.255
Block size: 8,192
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUVPN-NET
CIDR: 145.90.224.0/19
IP Range: 145.90.224.0 - 145.90.255.255
Block size: 8,192
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUVPN-NET
CIDR: 145.126.192.0/19
IP Range: 145.126.192.0 - 145.126.223.255
Block size: 8,192
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUVPN-NET
CIDR: 145.101.56.0/21
IP Range: 145.101.56.0 - 145.101.63.255
Block size: 2,048
Netherlands SURFnet
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: SURFNET
CIDR: N/A
IP Range: 192.42.116.0 - 192.42.122.255
Block size: 1,792
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: N/A
IP Range: 192.42.128.0 - 192.42.132.255
Block size: 1,280
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUROAM-AS-A-SERVICE-NET
CIDR: 145.96.0.0/22
IP Range: 145.96.0.0 - 145.96.3.255
Block size: 1,024
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUROAM-AS-A-SERVICE-NET
CIDR: 145.96.4.0/22
IP Range: 145.96.4.0 - 145.96.7.255
Block size: 1,024
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUROAM-AS-A-SERVICE-NET
CIDR: 145.96.8.0/22
IP Range: 145.96.8.0 - 145.96.11.255
Block size: 1,024
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUVPN-NET
CIDR: 145.144.244.0/23
IP Range: 145.144.244.0 - 145.144.245.255
Block size: 512
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-POPCO
CIDR: 195.169.0.0/23
IP Range: 195.169.0.0 - 195.169.1.255
Block size: 512
Netherlands SURFnet BV
EduVPN Utrecht
View all IPs >> View all domains >>
Network: SN-POPCO
CIDR: 195.169.120.0/23
IP Range: 195.169.120.0 - 195.169.121.255
Block size: 512
Netherlands SURFnet BV
SURFnet Network P.O. Box 19035 Utrecht 3501 DA
View all IPs >> View all domains >>
Network: SURFNET-DNS-ANYCAST
CIDR: 145.0.0.0/24
IP Range: 145.0.0.0 - 145.0.0.255
Block size: 256
Netherlands SURFnet BV
SURFnet Network P.O. Box 19035 Utrecht 3501 DA
View all IPs >> View all domains >>
Network: SURFNET-MAILFILTER
CIDR: 145.0.1.0/24
IP Range: 145.0.1.0 - 145.0.1.255
Block size: 256
Netherlands SURFnet
View all IPs >> View all domains >>
Network: SURFNET-NET
CIDR: 145.0.3.0/24
IP Range: 145.0.3.0 - 145.0.3.255
Block size: 256
Netherlands SURFnet BV
OpenINTEL Active DNS Measurements See http://www.openintel.nl/ for more information
View all IPs >> View all domains >>
Network: SURFNET-OPENINTEL
CIDR: 145.0.9.0/24
IP Range: 145.0.9.0 - 145.0.9.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.16.188.0/24
IP Range: 192.16.188.0 - 192.16.188.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.16.200.0/24
IP Range: 192.16.200.0 - 192.16.200.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFMIRROR
CIDR: 192.42.113.0/24
IP Range: 192.42.113.0 - 192.42.113.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.42.115.0/24
IP Range: 192.42.115.0 - 192.42.115.255
Block size: 256
Netherlands SURFnet BV
View all IPs >> View all domains >>
Network: TOR-EXIT-AND-MORE
CIDR: 192.42.116.0/24
IP Range: 192.42.116.0 - 192.42.116.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.42.117.0/24
IP Range: 192.42.117.0 - 192.42.117.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.42.118.0/24
IP Range: 192.42.118.0 - 192.42.118.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.42.119.0/24
IP Range: 192.42.119.0 - 192.42.119.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.42.121.0/24
IP Range: 192.42.121.0 - 192.42.121.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.42.122.0/24
IP Range: 192.42.122.0 - 192.42.122.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFWIM
CIDR: 192.42.123.0/24
IP Range: 192.42.123.0 - 192.42.123.255
Block size: 256
Netherlands SURFnet BV
P.O. Box 19035 Utrecht 3501 DA
View all IPs >> View all domains >>
Network: SURFNET-HSV
CIDR: 192.65.96.0/24
IP Range: 192.65.96.0 - 192.65.96.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-POPCO-NET
CIDR: 192.87.3.0/24
IP Range: 192.87.3.0 - 192.87.3.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-CIDR-PART-IV
CIDR: 192.87.4.0/24
IP Range: 192.87.4.0 - 192.87.4.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-NIKHEF-STORAGE-LAN
CIDR: 192.87.40.0/24
IP Range: 192.87.40.0 - 192.87.40.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-SNET-LAN-TC2
CIDR: 192.87.66.0/24
IP Range: 192.87.66.0 - 192.87.66.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-CIDR-PART-V
CIDR: 194.171.3.0/24
IP Range: 194.171.3.0 - 194.171.3.255
Block size: 256
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-CIDR-PART-VI
CIDR: 195.169.2.0/24
IP Range: 195.169.2.0 - 195.169.2.255
Block size: 256
Netherlands SURFnet BV
SURFnet Network P.O. Box 19035 Utrecht 3501 DA
View all IPs >> View all domains >>
Network: SURFNET-MAILFILTER
CIDR: 195.169.13.0/24
IP Range: 195.169.13.0 - 195.169.13.255
Block size: 256
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: MIXED-VLANS-AT-UTRECHT
CIDR: 195.169.124.128/25
IP Range: 195.169.124.128 - 195.169.124.255
Block size: 128
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: VLAN6-AT-AMSTERDAM
CIDR: 195.169.124.64/27
IP Range: 195.169.124.64 - 195.169.124.95
Block size: 32
Netherlands SURFnet BV
P.O. Box 19035 3501 DA Utrecht
View all IPs >> View all domains >>
Network: VLAN6-AT-NIJMEGEN
CIDR: 195.169.124.96/27
IP Range: 195.169.124.96 - 195.169.124.127
Block size: 32
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SURFIDS
CIDR: 192.87.23.48/28
IP Range: 192.87.23.48 - 192.87.23.63
Block size: 16
Netherlands SURFnet BV
Utrecht
View all IPs >> View all domains >>
Network: SN-EDUROAM-AS-A-SERVICE-NET
CIDR: 192.87.23.160/28
IP Range: 192.87.23.160 - 192.87.23.175
Block size: 16

NetworksDB NetworksDB Domains - IP to Org - AS - Github - X - Licensing
IP Geolocation by DB-IP 		Rendered in 0.13s