asn.dev

Autonomous system

AS208562 ALTEHOLZ

Unclassified RIPE Enterprise

IPv4 addresses 0 0 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly DE
Exchanges 1 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

Thorsten Alteholz

Germany · AI-generated

individual ipv6 enterprise

The AS handle ALTEHOLZ is held by Thorsten Alteholz.

What it's used for

  • The space carries a single IPv6 prefix, 2001:678:ad8::/48, with no IPv4 addresses announced.
  • The inventory consists of 1 IPv6 prefix against 3 observed neighbours, indicating a small-scale network with limited peering.
  • Traffic from this AS is associated with an individual's enterprise infrastructure, specifically hardware and software services, rather than mass consumer access or large-scale transit.

Notable

  • The registry holder is Thorsten Alteholz, consistent with the AS handle.
  • The address inventory is minimal, comprising only a single /48 block in Germany.
  • The operator is identified in secondary sources as an individual running a small business, distinct from large telecommunications providers.

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

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
Local Internet Exchange NetherlandsMeppel, Netherlands185.1.138.46

Transit providers

3 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS6517LAKENETWORKS23
AS34872Sarah Rossius trading as Servperso Systems8
AS20473The Constant Company, LLC6

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, 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 0 prefixes · 0 addresses IPv6 1 prefixes

CountryNamePrefixes
DEGermany1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS208562
Registry name
ALTEHOLZ
Registrant
alteholz01
Abuse contact
ipv6@alteholz.eu
Registered
2019-07-12
Last changed
2026-02-10
Allocation
allocated

Declared

PeeringDB profile

self-reported
Name
Alteholz
Also known as
Thorsten Alteholz Hard- und Software
Network type
Enterprise
Scope
Not Disclosed
Traffic ratio
Not Disclosed
Peering policy
Open
Website
https://www.alteholz.eu

PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS208562
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
2 naming AS208562

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 1,852 prefixes, as published 2026-10-27. 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