asn.dev

Autonomous system

AS57948 COBALT IPWorks

Unclassified RIPE

IPv4 addresses 2.56K 5 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly BE
Exchanges 0 recorded by PCH
Upstreams 1 1 downstream
Flagged prefixes 0 none

Summary

Cobalt Group

Belgium · AI-generated

business hosting belgium

The AS handle COBALT is held by Cobalt Group BV.

What it's used for

  • The address space carries static IP addresses for business and cloud services, evidenced by reverse DNS entries like static.ipworks.be and netnames such as BE-IPWORKS-20190315 and BE-CLOUDGROUP-19980109.
  • The AS announces 2560 IPv4 addresses across 5 prefixes and 1 IPv6 prefix, with only 2 observed routing neighbours, indicating a small-scale access or hosting network rather than a transit provider.
  • Traffic from this AS consists of web and API endpoints for the Cobalt Group's IT services and cloud infrastructure, serving corporate clients in Belgium.

Notable

  • Registrants for the majority of prefixes are listed as IPWorks Networks Operations under Cobalt Group BV, while the largest block 195.253.208.0/22 is registered to Cloud Group NV, suggesting a historical acquisition or internal rebranding.
  • The inventory is finely subdivided into five distinct IPv4 prefixes, reflecting an internal corporate estate structure rather than a large consumer base.

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

ASNetworkPaths seen
AS48408Localitel bvba612

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, 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 · 2.56K addresses IPv6 1 prefixes

CountryNamePrefixes
BEBelgium6

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS57948
Registry name
COBALT
Registrant
MNT-DK
Abuse contact
abuse@ipworks.be
Registered
2012-03-19
Last changed
2024-11-15
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
64% valid · 7 valid, 4 with no ROA
ROAs
23 authorising AS57948
ASPA
no ASPA record
IRR
100% registered · 11 of 11 announcements
Route objects
30 naming AS57948

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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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