asn.dev

Autonomous system

AS42221 ZURKUHL-AS

Unclassified RIPE

IPv4 addresses 1.02K 1 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly DE
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Zurkuhl GmbH

Germany · AI-generated

business corporate germany

The AS handle ZURKUHL-AS is held by Zurkuhl GmbH, a company based in Ratingen, Germany.

What it's used for

  • The address space carries corporate infrastructure, evidenced by reverse DNS entries pointing to infra.zurkuhl.com and the netname DE-ZURKUHL-20150206.
  • The AS announces 1024 IPv4 addresses within a single /22 prefix (185.87.0.0/22) and one IPv6 prefix (2a05:bd04::/30), with only one observed routing neighbour, indicating a small, self-contained corporate network rather than a transit or access provider.
  • Traffic from this AS consists of internal corporate endpoints and services for Zurkuhl GmbH, a business entity located at Fester Str. 54 in Ratingen.

Notable

  • The RDAP registrant for the announced prefix is Zurkuhl GmbH, which matches the AS holder and registry name.
  • The address inventory is compact, consisting of a single contiguous IPv4 block and a single IPv6 prefix, typical of a private corporate estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS24961WIIT AG306

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 1.02K addresses IPv6 1 prefixes

CountryNamePrefixes
DEGermany2

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS42221
Registry name
ZURKUHL-AS
Registrant
Zurkuhl GmbH
Abuse contact
abuse@zurkuhl.de
Registered
2015-02-06
Last changed
2024-02-29
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 6 valid, 0 with no ROA
ROAs
7 authorising AS42221
ASPA
no ASPA record
IRR
100% registered · 6 of 6 announcements
Route objects
8 naming AS42221

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 447 networks and 1,845 prefixes, as published 2026-10-31. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check