asn.dev

Autonomous system

AS31131 GRUNDFOS-AS Poul Due Jensens Vej 7

Unclassified RIPE

IPv4 addresses 1.79K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly DK
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Grundfos

Denmark · AI-generated

business corporate pumps denmark

GRUNDFOS-AS is the autonomous system for Grundfos Holding A/S, the world's largest pump manufacturer.

What it's used for

  • The address space carries corporate infrastructure, evidenced by netnames DK-GRUNDFOS and registrants listed as Grundfos Holding A/S.
  • The AS announces 1792 IPv4 addresses across 5 prefixes with only 2 observed neighbours, indicating a small, self-contained internal corporate estate rather than a transit or access network.

Notable

  • Registrants for four of the five prefixes are Grundfos Holding A/S, while the largest prefix 193.3.8.0/23 is registered under RIPE-NCC-MANAGED-ADDRESS-BLOCK with an unknown registrant.
  • The address inventory consists of five contiguous IPv4 prefixes within the 193.3.0.0/16 range, with no IPv6 prefixes in inventory.

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
AS31027GlobalConnect A/S227
AS3292TDC Holding A/S186

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, 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 5 prefixes · 1.79K addresses IPv6 0 prefixes

CountryNamePrefixes
DKDenmark5

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS31131
Registry name
GRUNDFOS-AS
Registrant
GRUNDFOS-MNT
Abuse contact
postmaster@abuse.mail.dk
Registered
2004-03-05
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 7 with no ROA
ROAs
0 authorising AS31131
ASPA
no ASPA record
IRR
100% registered · 7 of 7 announcements
Route objects
11 naming AS31131

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: 445 networks and 1,817 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