Autonomous system
AS21054 RBSG-UK-AS Edinburgh
Unclassified RIPE
Summary
NatWest Markets
business finance corporate uk
The AS handle RBSG-UK-AS Edinburgh is held by NatWest Markets PLC.
What it's used for
- The address space is registered under the netname
UK-NATWEST-155-136-0-0-16, indicating a dedicated corporate estate for the financial services division. - The network announces 61184 IPv4 addresses across 23 prefixes, all within the United Kingdom, while maintaining only 3 observed routing neighbours. This high address-to-neighbour ratio characterizes the AS as an internal corporate network rather than a transit or access provider.
Notable
- All RDAP registrants for the largest prefixes are listed as "Technical Role" under the consistent netname
UK-NATWEST-155-136-0-0-16, aligning with the registry holder NatWest Markets PLC. - The address inventory is finely subdivided into 23 distinct prefixes, ranging from /18s down to /24s, which reflects site-by-site segmentation typical of a large enterprise infrastructure.
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.
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
IPv4 3 prefixes · 1.79K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS21054- Registry name
- UK-NATWEST-AS21054
- Registrant
- Natwest Markets PLC
- Abuse contact
- ripe-abuse@rbs.com
- Registered
- 2002-03-07
- Last changed
- 2026-04-10
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 11 with no ROA
- ROAs
- 0 authorising AS21054
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 32 naming AS21054
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