Autonomous system
AS8272 NETSCALIBUR-UK
Unclassified RIPE
Summary
Claranet Limited (legacy Netscalibur UK)
legacy unclassified
NETSCALIBUR-UK is registered to Claranet Limited, the London-based managed hosting and network services group. The handle is a fossil: Netscalibur was a UK provider absorbed into Claranet, and the AS number outlived the brand.
What it's used for
- Almost nothing. The AS announces a single /24,
193.221.118.0/24, and takes transit from exactly one upstream, Claranet's main AS8426. It has no downstreams. - That /24 is not Claranet's own space: it is provider-independent space registered to a separate
CONVERGENCEorganisation at Telehouse London. Every address in it answers to the same wildcard reverse name,foo.convergence.cx.
Notable
- Left unclassified on purpose. A vestigial AS whose entire inventory is one third-party PI /24 with wildcard rDNS has no honest kind. It is not Claranet's hosting network, it carries no customers, and labelling it with Claranet's kind would put Claranet's shape onto addresses that are not Claranet's.
- Do not geolocate or attribute this /24 to Claranet's business. The holder of the AS and the holder of the addresses are different organisations.
- Claranet's real network activity lives on its other autonomous systems, of which this is not one.
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
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.
| AS | Network | Paths seen |
|---|---|---|
| AS8426 | Claranet Limited | 59 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-12, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 1 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS8272- Registry name
- NETSCALIBUR-UK
- Registrant
- AS8426-MNT
- Abuse contact
- abuse@clara.net
- Registered
- 2002-09-20
- Last changed
- 2017-11-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 1 authorising AS8272
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS8272
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: 436 networks and 1,769 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