AS21339 Contingency Networks Ltd

United Kingdom ContingencyNetworks RIPE 7 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

3,328

IPv6 /48 networks

RPKI

7 valid0 no ROA

Peers and downstreams

Holder

AS name: ContingencyNetworks
Description: Contingency Networks Ltd
Organisation: Contingency Networks Ltd
Registered in: London, United Kingdom
Abuse contact: jon@contingencynetworks.co.uk
Assigned: 2012-09-05
Registered: 2012-09-06
Record last changed: 2026-09-18 17:49 UTC

158.94.215.0/24 176.124.68.0/23 185.61.164.0/22 193.187.99.0/24 45.143.120.0/23 45.143.122.0/23 77.93.143.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 75/100

pass	Prefixes covered by valid ROAs 7 of 7 announced prefixes are RPKI valid.	25/25
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 jon@contingencynetworks.co.uk 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 2026-09-18.	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/21339"><img src="https://ip-fd.net/badge/asn/21339/health.svg" alt="AS21339 network health on IP-FD.net"></a>

Markdown

[![AS21339 network health](https://ip-fd.net/badge/asn/21339/health.svg)](https://ip-fd.net/asn/21339)

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

Routing changes

Last 30 days

2026-10-04 13:42 UTC	Neighbour gone	AS9009	upstream
2026-10-04 13:42 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 13:42 UTC	New neighbour	AS49915	upstream
2026-10-04 13:42 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS39351	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS34927	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS264409	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS22356	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS215638	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS20562	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 13:42 UTC	Relationship changed	AS137409	upstream to peer

WHOIS

aut-num:        AS21339
as-name:        ContingencyNetworks
org:            ORG-CNL16-RIPE
admin-c:        JR5606-RIPE
tech-c:         JR5606-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         CNL-MAINT
created:        2012-09-06T12:07:32Z
last-modified:  2026-09-18T17:49:22Z
source:         RIPE
% 17 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/21339

const res = await fetch('https://ip-fd.net/api/v1/asn/21339', {
  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/21339', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/21339');
curl_setopt($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/21339", 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))

Works without a key at a lower rate. Get a free key.

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