IPv4 prefix

145.100.0.0/14

IP Prefix (CIDR): 145.100.0.0/14
Subnet Mask: 255.252.0.0
Address Count: 262,144
IP Range: 145.100.0.0 - 145.103.255.255
Subnet calculator: Calculate subnet details

Registered Owners

Registration 1 of 7

Owner: SURF B.V.
Handle: ORG-Sb3-RIPE
Country: Netherlands (NL)
Address: P.O. Box 19035 3501 DA Utrecht NETHERLANDS
Registry: RIPENCC
Registered Prefix: 145.96.0.0/12 (145.96.0.0 - 145.111.255.255)
Delegated Prefix: 145.88.0.0/13 (145.88.0.0 - 145.95.255.255)

Registration 2 of 7

Handle: SN-LIR-MNT
Country: Netherlands (NL)
Registry: RIPENCC
Registered Prefixes: 145.100.0.0/18 (145.100.0.0 - 145.100.63.255)
145.100.64.0/20 (145.100.64.0 - 145.100.79.255)
145.100.88.0/21 (145.100.88.0 - 145.100.95.255)
145.100.96.0/20 (145.100.96.0 - 145.100.111.255)
145.100.116.0/23 (145.100.116.0 - 145.100.117.255)
145.100.120.0/22 (145.100.120.0 - 145.100.123.255)
145.100.124.0/22 (145.100.124.0 - 145.100.127.255)
145.100.128.0/21 (145.100.128.0 - 145.100.135.255)
145.100.144.0/20 (145.100.144.0 - 145.100.159.255)
145.100.160.0/20 (145.100.160.0 - 145.100.175.255)
145.100.176.0/22 (145.100.176.0 - 145.100.179.255)
145.100.180.0/22 (145.100.180.0 - 145.100.183.255)
145.100.184.0/22 (145.100.184.0 - 145.100.187.255)
145.100.188.0/22 (145.100.188.0 - 145.100.191.255)
145.100.192.0/21 (145.100.192.0 - 145.100.199.255)
145.100.200.0/21 (145.100.200.0 - 145.100.207.255)
145.100.208.0/21 (145.100.208.0 - 145.100.215.255)
145.100.216.0/23 (145.100.216.0 - 145.100.217.255)
145.100.224.0/21 (145.100.224.0 - 145.100.231.255)
145.101.0.0/19 (145.101.0.0 - 145.101.31.255)
145.101.32.0/21 (145.101.32.0 - 145.101.39.255)
145.101.44.0/22 (145.101.44.0 - 145.101.47.255)
145.101.48.0/24 (145.101.48.0 - 145.101.48.255)
145.101.49.0/24 (145.101.49.0 - 145.101.49.255)
145.101.50.0/23 (145.101.50.0 - 145.101.51.255)
145.101.52.0/22 (145.101.52.0 - 145.101.55.255)
145.101.56.0/21 (145.101.56.0 - 145.101.63.255)
145.101.64.0/20 (145.101.64.0 - 145.101.79.255)
145.101.80.0/20 (145.101.80.0 - 145.101.95.255)
145.101.96.0/20 (145.101.96.0 - 145.101.111.255)
145.101.112.0/20 (145.101.112.0 - 145.101.127.255)
145.101.128.0/18 (145.101.128.0 - 145.101.191.255)
145.102.0.0/23 (145.102.0.0 - 145.102.1.255)
145.102.4.0/23 (145.102.4.0 - 145.102.5.255)
145.102.6.0/24 (145.102.6.0 - 145.102.6.255)
145.102.8.0/22 (145.102.8.0 - 145.102.11.255)
145.102.12.0/22 (145.102.12.0 - 145.102.15.255)
145.102.32.0/19 (145.102.32.0 - 145.102.63.255)
145.102.64.0/19 (145.102.64.0 - 145.102.95.255)
145.102.96.0/20 (145.102.96.0 - 145.102.111.255)
145.102.128.0/24 (145.102.128.0 - 145.102.128.255)
145.102.129.0/24 (145.102.129.0 - 145.102.129.255)
145.102.130.0/24 (145.102.130.0 - 145.102.130.255)
145.102.132.0/22 (145.102.132.0 - 145.102.135.255)
145.102.136.0/22 (145.102.136.0 - 145.102.139.255)
145.102.144.0/20 (145.102.144.0 - 145.102.159.255)
145.102.160.0/19 (145.102.160.0 - 145.102.191.255)
145.102.192.0/19 (145.102.192.0 - 145.102.223.255)
145.102.224.0/21 (145.102.224.0 - 145.102.231.255)
145.102.232.0/21 (145.102.232.0 - 145.102.239.255)
145.102.240.0/21 (145.102.240.0 - 145.102.247.255)
145.102.248.0/21 (145.102.248.0 - 145.102.255.255)
145.103.0.0/16 (145.103.0.0 - 145.103.255.255)
Delegated Prefix: 145.88.0.0/13 (145.88.0.0 - 145.95.255.255)

Registration 3 of 7

Handle: AS1124-MNT
Country: Netherlands (NL)
Registry: RIPENCC
Registered Prefix: 145.100.112.0/22 (145.100.112.0 - 145.100.115.255)
Delegated Prefix: 145.88.0.0/13 (145.88.0.0 - 145.95.255.255)

Registration 4 of 7

Owner: Universiteit Twente
Handle: ORG-UT18-RIPE
Country: Netherlands (NL)
Address: The Netherlands
Registry: RIPENCC
Registered Prefix: 145.100.118.0/23 (145.100.118.0 - 145.100.119.255)
Delegated Prefix: 145.88.0.0/13 (145.88.0.0 - 145.95.255.255)

Registration 5 of 7

Handle: SURF-AUTO-MNT
Country: Netherlands (NL)
Registry: RIPENCC
Registered Prefixes: 145.100.232.0/21 (145.100.232.0 - 145.100.239.255)
145.100.240.0/20 (145.100.240.0 - 145.100.255.255)
145.102.7.0/24 (145.102.7.0 - 145.102.7.255)
145.102.112.0/20 (145.102.112.0 - 145.102.127.255)
145.102.131.0/24 (145.102.131.0 - 145.102.131.255)
Delegated Prefix: 145.88.0.0/13 (145.88.0.0 - 145.95.255.255)

Registration 6 of 7

Owner: AMOLF
Handle: ORG-AA1137-RIPE
Country: Netherlands (NL)
Address: Science Park 104, 1098 XG Amsterdam
Registry: RIPENCC
Registered Prefix: 145.101.40.0/22 (145.101.40.0 - 145.101.43.255)
Delegated Prefix: 145.88.0.0/13 (145.88.0.0 - 145.95.255.255)

Registration 7 of 7

Owner: Radboud Universiteit Nijmegen
Handle: ORG-RU11-RIPE
Country: Netherlands (NL)
Address: P.O. box 9101 NL-6500 HB Nijmegen the Netherlands
Registry: RIPENCC
Registered Prefixes: 145.102.16.0/21 (145.102.16.0 - 145.102.23.255)
145.102.24.0/21 (145.102.24.0 - 145.102.31.255)
Delegated Prefix: 145.88.0.0/13 (145.88.0.0 - 145.95.255.255)

BGP Announcements

Announced Prefix	Relationship	Origin ASN	Description	Country	First Address	Last Address
145.100.0.0/14	Exact	AS1103	SURF B.V.	Netherlands (NL)	145.100.0.0	145.103.255.255
145.100.118.0/23	More specific	AS1149	SURF B.V.	Netherlands (NL)	145.100.118.0	145.100.119.255
145.102.0.0/23	More specific	AS215088	Stichting Internet Domeinregistratie Nederland	Netherlands (NL)	145.102.0.0	145.102.1.255
145.102.4.0/23	More specific	AS1101	SURF B.V.	Netherlands (NL)	145.102.4.0	145.102.5.255
145.102.132.0/22	More specific	AS1104	Stichting Nederlandse Wetenschappelijk Onderzoek Instituten	Netherlands (NL)	145.102.132.0	145.102.135.255