asn.dev

Autonomous system

AS56817 AS-COOLNET2-SK COOL NET

Unclassified ARIN

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

Summary

TMN SA

Switzerland · AI-generated

business switzerland leased

AS-COOLNET2-SK is held by TMN SA.

What it's used for

  • The single announced prefix 78.24.125.0/24 carries the netname British-Telecommunications-PLC, indicating the address space is leased from or associated with BT infrastructure.
  • With 256 IPv4 addresses and only 1 observed neighbour, the network operates as a small, isolated endpoint rather than a transit or access provider.
  • Traffic from this AS consists of specific business or infrastructure endpoints hosted within the leased BT address block.

Notable

  • The RDAP registrant for the prefix is TMN SA, which matches the AS holder, while the netname identifies the original owner as British-Telecommunications-PLC.
  • The AS handle AS-COOLNET2-SK and the netname British-Telecommunications-PLC suggest a history of address space reassignment or leasing from a major telecommunications provider to a smaller Swiss entity.
  • The inventory consists of a single /24 block, representing a compact and specific allocation.

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

ASNetworkPaths seen
AS20648TMN SA66

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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
CHSwitzerland1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS56817
Registry name
AS-56817
Registrant
TMN SA
Abuse contact
complaints@trafficmind.com
Registered
2022-09-26
Last changed
2026-07-13
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS56817
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
2 naming AS56817

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 1,845 prefixes, as published 2026-10-31. 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