Data as of Nov 11, 2026
37.
- Proxy activity
- Not seen in 30 days
- Type
- Hosting
- Risk
- 50 / 100 · Medium
- Announced by
- AS25151Cyso Group B.V.cyso.comHosting
- Announcement
- 37.46.136.0/21RPKI valid
- Location
- Amsterdam, North Holland, The Netherlands
Network & registry
Announced by
Announcement
- Prefix
- 37.46.136.0/21
- Announced by
- AS25151 Cyso Group B.V.
- Type
- Hosting
- RPKI
- RPKI valid
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 address
- 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
Geolocation
Location detail
- Country
- The Netherlands
- Region
- North Holland
- City
- Amsterdam
- Coordinates
- 52.
3740, 4. 8897 - Time zone
- Europe/Amsterdam
- Continent
- Europe
- EU
- yes
- GeoNames
- 2759794