Data as of Nov 11, 2026

37.157.4.0/23

No anonymizer space · no proxy exits in 30 days

Adform A/S

Announcement

this exact prefix

RPKI valid

Announced by

AS198622

Type

Business

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Holder	RPKI
37.157.0.0/21 since Nov 2015	AS198622	Business	Adform A/S

More specific

Announcements inside

Prefix	Origin	Type	Holder	RPKI
37.157.4.0/24 since Nov 2017	AS198622	Business	Adform A/S

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
37.157.0.0/21	2,048	DK-ADFORM-20120313	Adform A/S (ORG-AA769-RIPE) · DK	ALLOCATED PA	Mar 13, 2012	net-abuse@adform.com
└ 37.157.4.0/23	512	ADFORM-NET	Adform DTC IPv4 Network	ASSIGNED PA	Sep 22, 2015	net-abuse@adform.com via DK-ADFORM-20120313

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

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern: Stable
First seen: Apr 2015
Current origin since: Aug 2016 · 10 yr
Origin networks: 1

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
37.157.0.0/21	AS47292	/24	RIPE	Another network
37.157.0.0/21	AS198622	/24	RIPE	RPKI valid

IRR

Route objects on the exact prefix

Origin	Registry	Description	Maintainer	Modified
AS47292 not the origin	RIPE	Adform DTC IPv4 Network	ADFORM	Jan 23, 2023
AS198622	RIPE	Adform DTC IPv4 Network	ADFORM	Mar 28, 2015

IRR inside

Route objects inside

Prefix	Origin	Registry	Description	Maintainer	Modified
37.157.5.0/24	AS47292	RIPE	Adform DTC IPv4 Network	ADFORM	Jan 23, 2023
37.157.5.0/24	AS198622	RIPE	Adform DTC IPv4 Network	ADFORM	Mar 28, 2015