AS21054 Natwest Markets PLC

United Kingdom UK-NATWEST-AS21054 RIPE 15 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

65,536

IPv6 /48 networks

RPKI

0 valid15 no ROA

Peers and downstreams

Holder

AS name: UK-NATWEST-AS21054
Description: Edinburgh
Organisation: Natwest Markets PLC
Registered in: London, United Kingdom
Abuse contact: ripe-abuse@rbs.com
Assigned: 2001-08-07
Registered: 2002-03-07
Record last changed: 2026-04-10 15:39 UTC

155.136.0.0/16 155.136.0.0/17 155.136.128.0/17 155.136.144.0/24 155.136.146.0/24 155.136.197.0/24 155.136.200.0/23 155.136.202.0/23 155.136.202.0/24 155.136.203.0/24 155.136.60.0/22 155.136.60.0/24 155.136.61.0/24 155.136.62.0/24 155.136.63.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade D · 50/100

fail	Prefixes covered by valid ROAs 0 of 15 announced prefixes are RPKI valid, 15 have no ROA.	0/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
fail	Announces IPv6 No IPv6 prefixes are announced.	0/15
pass	More than one upstream 3 upstreams seen in BGP.	10/10
pass	Working abuse contact ripe-abuse@rbs.com is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
pass	Registry record maintained Last changed 2026-04-10.	5/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/21054"><img src="https://ip-fd.net/badge/asn/21054/health.svg" alt="AS21054 network health on IP-FD.net"></a>

Markdown

[![AS21054 network health](https://ip-fd.net/badge/asn/21054/health.svg)](https://ip-fd.net/asn/21054)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

No changes recorded in the last 30 days. Changes are recorded each time the routing data of this AS is refreshed. Get alerts in real time.

WHOIS

aut-num:        AS21054
as-name:        UK-NATWEST-AS21054
org:            ORG-TRBO2-RIPE
descr:          Edinburgh
admin-c:        CL5041-RIPE
tech-c:         RTST1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         RBSG-MNT
created:        2002-03-07T14:53:40Z
last-modified:  2026-04-10T15:39:43Z
source:         RIPE
% 11 routing policy lines (import/export) not shown

Routing data

Updated just now

Registry record

Fetched just now from RIPE

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/21054

const res = await fetch('https://ip-fd.net/api/v1/asn/21054', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/21054', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/21054');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/21054", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

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