asn.dev

Autonomous system

AS52001 GROTRIAN-AS

Unclassified RIPE

IPv4 addresses 512 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly DE
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Christian Rolf Grotrian

Germany · AI-generated

business consulting germany

GROTRIAN-AS is held by Christian Rolf Grotrian.

What it's used for

  • The space carries the netname GROTRIAN-NET, associated with Grotrian IT Consulting in Hamburg, Germany.
  • The AS announces 512 IPv4 addresses across 1 prefix (91.221.182.0/23) with 0 IPv6 prefixes.
  • With only 1 observed neighbour, the network functions as a small, isolated endpoint rather than a transit or large access provider.
  • Traffic from this AS consists of web/API endpoints and office workers for a private IT consulting firm.

Notable

  • The RDAP registrant Christian Rolf Grotrian matches the AS holder and the netname GROTRIAN-NET.
  • The address inventory consists of a single /23 block, indicating a small, self-contained 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 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS8893Artfiles New Media GmbH60

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, 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 · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
DEGermany1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS52001
Registry name
GROTRIAN-AS
Registrant
KGT-MNT
Abuse contact
mail@grotrian-it.de
Registered
2010-12-14
Last changed
2025-10-09
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS52001
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS52001

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: 440 networks and 1,773 prefixes, as published 2026-10-13. 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