asn.dev

Autonomous system

AS203017 HAMBURGWASSER

Unclassified RIPE

IPv4 addresses 256 1 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly DE
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Hamburger Wasserwerke

Germany · AI-generated

business municipal utility

HAMBURGWASSER is the autonomous system for Hamburger Wasserwerke GmbH.

What it's used for

  • The space carries a single IPv4 prefix, 193.53.23.0/24, and one IPv6 prefix, 2001:678:154::/48.
  • With 256 IPv4 addresses and 2 observed neighbours, the low neighbour count relative to the address space indicates a small, self-contained network rather than a transit provider.
  • As the municipal water utility for Hamburg, this AS supports internal corporate operations, including administrative systems and site connectivity for water infrastructure management.

Notable

  • The RDAP registrant for the announced prefix is ScaleUp Technologies GmbH & Co. KG with netname DE-INTERNET4YOU-19990803, which differs from the AS holder HAMBURGWASSER Hamburger Wasserwerke GmbH.
  • The address inventory consists of a single /24 block and a single /48 IPv6 prefix, representing a minimal footprint typical of a specific department or site within a larger 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

2 upstream, 0 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS29014ScaleUp Technologies GmbH & Co. KG57
AS3320Deutsche Telekom AG39

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, 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 · 256 addresses IPv6 1 prefixes

CountryNamePrefixes
DEGermany2

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS203017
Registry name
HAMBURGWASSER
Registrant
HHWW-MNT
Abuse contact
Hamburger_Wasserwerke_GmbH@ripe.scaleuptech.com
Registered
2016-04-15
Last changed
2020-11-16
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 2 valid, 0 with no ROA
ROAs
2 authorising AS203017
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS203017

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: 448 networks and 1,851 prefixes, as published 2026-10-29. 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