Data as of Nov 6, 2026
145.51.0.0/16
No anonymizer space · no proxy exits in 30 daysSurf 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. | 131,072 | SURFNET-EARLY-REGISTRATIONS | Surf B.V. (ORG-SB3-RIPE) · NL | LEGACY | Aug 31, 2015 | cert@ |
| └ 145.51.0.0/16 | 65,536 | HRO-NET | Hogeschool Rotterdam | LEGACY | — | 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.
51. 0. 0 - 145. 52. 255. 255 - Registration type
- LEGACY
- Record created
- Aug 31, 2015
- Legacy
- yes
Origin network
AS1103
NL
- Name
- Surf B.V.
- Type
- Education
- Registered
- Sep 1, 1993
- Domain
- surf.nl
- Website
- www.surf.nl/en
- Industry
- Computer and Information Technology
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 145.
51. 0. 0/ 16 - Netname
- HRO-NET
- Registrant
- Hogeschool Rotterdam
- Registrant country
- NL
- Organization
- Hogeschool Rotterdam
- Org country
- NL
- Type
- LEGACY
- Created
- Not stated by the registry
- Updated
- Mar 2, 2026
- 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