asn.dev

Autonomous system

AS51939 TERRANETUK

Unclassified RIPE

IPv4 addresses 0 0 prefixes
IPv6 prefixes 10 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 5 0 downstream
Flagged prefixes 0 none

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

5 upstream, 0 downstream and 5 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS52025ParadoxNetworks Limited103
AS209735Lagrange Cloud Technologies Limited85
AS20473The Constant Company, LLC81
AS207841Inferno Communications Ltd41
AS63473HostHatch, LLC40

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 0 prefixes · 0 addresses IPv6 10 prefixes

CountryNamePrefixes
GBUnited Kingdom10

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS51939
Registry name
TerraMC
Registrant
Terra Management Consulting Ltd
Abuse contact
abuse@terra-net.uk
Registered
2022-12-22
Last changed
2025-12-31
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 10 valid, 0 with no ROA
ROAs
12 authorising AS51939
ASPA
no ASPA record
IRR
100% registered · 10 of 10 announcements
Route objects
29 naming AS51939

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 1,772 prefixes, as published 2026-10-15. 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