asn.dev

Autonomous system

AS31550 DYCKERHOFF-AS

Unclassified RIPE

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

Summary

Dyckerhoff GmbH

Germany · AI-generated

business cement corporate germany

DYCKERHOFF-AS is operated by Dyckerhoff GmbH.

What it's used for

  • The address space carries internal corporate infrastructure for a cement and concrete manufacturer, as indicated by the netname DYCKERHOFF and registrant DYCKERHOFF GmbH.
  • The AS announces a single IPv4 prefix, 194.31.233.0/24, comprising 256 addresses, with 0 IPv6 prefixes.
  • With only 2 observed neighbours, the low neighbour count relative to the address block suggests a small, self-contained corporate network rather than a transit or large-scale access provider.

Notable

  • The RDAP registrant DYCKERHOFF GmbH matches the AS holder, confirming consistent ownership of the announced space.
  • Dyckerhoff was fully acquired by Buzzi Unicem in 2013, which changed the company's legal form to a limited liability corporation (GmbH) to integrate it deeper into the Buzzi group.
  • The inventory consists of a single /24 block, representing a compact and finely subdivided internal estate typical of a specific corporate site or headquarters.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS28676WiTCOM Wiesbadener Informations- und Telekommunikations GmbH44
AS3320Deutsche Telekom AG16

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 0 prefixes

CountryNamePrefixes
DEGermany1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS31550
Registry name
DYCKERHOFF-AS
Registrant
DYCKERHOFF-MNT
Abuse contact
thomas.hucke@dyckerhoff.com
Registered
2004-06-10
Last changed
2020-11-16
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS31550
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS31550

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: 442 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