Data as of Nov 11, 2026

37.46.136.0/21

No anonymizer space · no proxy exits in 30 days

Cyso Group B.V.

Announcement

this exact prefix

RPKI valid

Announced by

AS25151

Type

Hosting

Risk

50 / 100 · Medium

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
37.46.136.0/21	2,048	NL-CYSO-20120120	Cyso Group B.V. (ORG-CMH1-RIPE) · NL	ALLOCATED PA	Jan 20, 2012	abuse@cyso.net
└ 37.46.136.0/24	256	NL-CYSO-PAY	Cyso Hosting B.V.	ASSIGNED PA	Jul 20, 2012	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.137.128/27	32	NL-CYSO-PAY	Cyso Hosting B.V.	ASSIGNED PA	May 24, 2013	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.137.160/28	16	NL-CYSO-MINTLAB	Cyso Hosting B.V.	ASSIGNED PA	Mar 4, 2014	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.137.179/32	1	NL-CYSO-TAFAPPS	Cyso Hosting B.V.	ASSIGNED PA	Mar 4, 2014	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.137.192/26	64	NL-CYSO-NIBC	Cyso Hosting B.V.	ASSIGNED PA	Jun 24, 2013	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.138.0/24	256	NL-CYSO-OOP-TMS	Cyso Hosting B.V.	ASSIGNED PA	May 24, 2013	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.139.0/27	32	NL-CYSO-VMWARE-TEST-INFRA	Cyso Hosting B.V.	ASSIGNED PA	Mar 4, 2014	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.139.32/27	32	NL-CYSO-VMWARE-TEST-VM	Cyso Hosting B.V.	ASSIGNED PA	Mar 4, 2014	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.139.104/29	8	CYSO-NEN	NEN, Managed by CYSO	ASSIGNED PA	Nov 3, 2015	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.140.0/24	256	NL-CYSO-SHARED-37-46-140	Cyso Hosting B.V.	ASSIGNED PA	Mar 27, 2014	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.141.0/24	256	NL-CYSO-NDA-37-46-141	Cyso Hosting B.V.	ASSIGNED PA	May 24, 2013	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.142.0/24	256	NL-CYSO-A-SEGMENT	Cyso Hosting B.V.	ASSIGNED PA	Mar 4, 2014	abuse@cyso.net via NL-CYSO-20120120
└ 37.46.143.0/24	256	NL-CYSO-B-SEGMENT	Cyso Hosting B.V.	ASSIGNED PA	Mar 4, 2014	abuse@cyso.net 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

Announcement Routing history RPKI & IRR Whois & abuse

Routing timeline

Who has announced this prefix

Summary

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 the exact prefix

Origin	Registry	Description	Maintainer	Modified
AS25151	RIPE	Cyso Hosting B.V. Block	CYSO-MNT	Aug 9, 2012