Data as of Nov 10, 2026
37.46.136.0/24
No anonymizer space · no proxy exits in 30 daysCyso Group B.V.
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 37.46.136.0/21 | 2,048 | NL-CYSO-20120120 | Cyso Group B.V. (ORG-CMH1-RIPE) · NL | ALLOCATED PA | Jan 20, 2012 | abuse@ |
| └ 37.46.136.0/24 | 256 | NL-CYSO-PAY | Cyso Hosting B.V. | ASSIGNED PA | Jul 20, 2012 | abuse@ via NL-CYSO-20120120 |
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
Announced by
Covering announcement 37.46.136.0/21
- Prefix
- 37.46.136.0/21
- Announced by
- AS25151 Cyso Group B.V.
- Type
- Hosting
- RPKI
- RPKI valid
- Netname
- NL-CYSO-20120120
- Registrant
- Cyso Group B.V.
- RIR
- RIPE NCC
Origin network
AS25151
NL
- Name
- Cyso Group B.V.
- Type
- Hosting
- Registered
- Aug 9, 2002
- Domain
- cyso.com
- Website
- www.cyso.com
- Industry
- Hosting and Cloud Provider
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 37.46.136.0/21
37.46.136.0/21
Routing history
- Pattern
- Stable
- First seen
- Feb 2012
- Current origin since
- Feb 2012 · 15 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 37.46.136.0/21 | AS25151 | /24 | RIPE | RPKI valid |
IRR
Route objects on 37.46.136.0/21
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS25151 | RIPE | Cyso Hosting B.V. Block | CYSO-MNT | Aug 9, 2012 |
Whois
Registration for this announcement
- Range
- 37.
46. 136. 0/ 21 - Netname
- NL-CYSO-20120120
- Registrant
- Cyso Group B.V.
- Registrant country
- NL
- Organization
- Cyso Group B.V. (ORG-CMH1-RIPE)
- Org country
- NL
- Type
- ALLOCATED PA
- Created
- Jan 20, 2012
- Updated
- Mar 13, 2025
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- NL
- Delegated
- Jan 20, 2012
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cyso. net - Name
- Cyso Hosting B.V. Technical Role Account
- Handle
- CYSO-RIPE