Data as of Nov 5, 2026
145.107.4.0/22
No anonymizer space · no proxy exits in 30 daysStichting Nederlandse Wetenschappelijk Onderzoek Instituten · space held by Surf B.V.
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 145.107.0.0/16 since Dec 2016 | AS1103 | Business | 148 | Surf B.V. |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 145. | 2,031,616 | SURFNET-EARLY-REGISTRATIONS | Surf B.V. (ORG-SB3-RIPE) · NL | LEGACY | Nov 24, 2025 | cert@ |
| └ 145.107.4.0/22 | 1,024 | NIKHEF-NET | NIKHEF | LEGACY | Oct 9, 2013 | cert@ via SURFNET-EARLY-REGISTRATIONS |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
IPv4 market
Holder
- Organization
- Surf B.V.
- Handle
- ORG-SB3-RIPE
- Range
- 145.
88. 0. 0 - 145. 118. 255. 255 - Registration type
- LEGACY
- Record created
- Nov 24, 2025
- Legacy
- yes
Origin network
AS1104
NL
- Name
- Stichting Nederlandse Wetenschappelijk Onderzoek Instituten
- Type
- Education
- Registered
- Sep 1, 1993
- Domain
- nikhef.nl
- Website
- www.nikhef.nl/
- Industry
- Research and Development Organizations
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Dec 2013
- Current origin since
- Jul 2020 · 6.3 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 145.107.4.0/22 | AS1104 | /22 | RIPE | RPKI valid |
| 145.107.0.0/16 | AS1103 | /24 | RIPE | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS1104 | RIPE | NIKHEF-CLUSTER | AS1103-MNT AS1104-MNT | Nov 5, 2013 |
Whois
Registration for this announcement
- Range
- 145.
107. 4. 0/ 22 - Netname
- NIKHEF-NET
- Registrant
- NIKHEF
- Registrant country
- NL
- Organization
- NIKHEF
- Org country
- NL
- Type
- LEGACY
- Created
- Oct 9, 2013
- Updated
- Jan 28, 2021
- Maintainer
- SN-LIR-MNT
- RIR
- RIPE NCC
- Country
- NL
- Delegated
- Sep 1, 1993
- Status
- assigned
Report abuse
Abuse contact
- cert@
surfcert. nl - Name
- SURF Network Maintainer
- Handle
- SNS1-RIPE