AS210203 RETN Limited

United Kingdom RETN-IT-AS RIPE 1 IPv4 prefix 0 IPv6 prefixes

IPv4 addresses

512

IPv6 /48 networks

RPKI

1 valid0 no ROA

Peers and downstreams

Holder

AS name: RETN-IT-AS
Description: RETN Limited
Organisation: RETN Limited
Registered in: London, United Kingdom
Abuse contact: abuse@retn.net
Assigned: 2018-09-18
Registered: 2018-09-19
Record last changed: 2026-04-16 19:59 UTC

139.45.198.0/23

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 85/100

pass	Prefixes covered by valid ROAs 1 of 1 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 2 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@retn.net is published.	15/15
pass	Publishes a geofeed A geofeed (RFC 8805) tells where the address space is used.	10/10
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 2026-04-16.	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/210203"><img src="https://ip-fd.net/badge/asn/210203/health.svg" alt="AS210203 network health on IP-FD.net"></a>

Markdown

[![AS210203 network health](https://ip-fd.net/badge/asn/210203/health.svg)](https://ip-fd.net/asn/210203)

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:        AS210203
as-name:        RETN-IT-AS
org:            ORG-RL19-RIPE
remarks:        
remarks:        ---------------------------------------------------------------
remarks:        *********************** Routing Policy ************************
remarks:        ---------------------------------------------------------------
remarks:        
remarks:        
remarks:        ---------------------------------------------------------------
remarks:        ****************** RETN bgp confederation *********************
remarks:        ---------------------------------------------------------------
remarks:        - AS9002
remarks:        - AS14947
remarks:        - AS25462
remarks:        - AS28886
remarks:        - AS29470
remarks:        - AS44877
remarks:        - AS51327
remarks:        - AS57304
remarks:        - AS60392
remarks:        - AS133405
remarks:        - AS134518
remarks:        - AS139903
remarks:        - AS150003
remarks:        - AS198947
remarks:        - AS209447
remarks:        - AS210203
remarks:        - AS214455
remarks:        - AS214845
remarks:        ---------------------------------------------------------------
remarks:        ********************* Contacts and URLs ***********************
remarks:        ---------------------------------------------------------------
remarks:        Routing issues noc at retn.net
remarks:        Peering issues and requests peering at retn.net
remarks:        SPAM and security issues abuse at retn.net
remarks:        Web Site http://retn.net
remarks:        Looking Glass http://lg.retn.net
remarks:        BGP communities list http://retn.net/bgp-communities
remarks:        or http://lg.retn.net/bgp-communities.html
remarks:        ---------------------------------------------------------------
remarks:        
admin-c:        RCD1-RIPE
tech-c:         RCD1-RIPE
status:         ASSIGNED
mnt-by:         MNT-RETN
mnt-by:         RIPE-NCC-END-MNT
created:        2018-09-19T10:17:57Z
last-modified:  2026-04-16T19:59:02Z
source:         RIPE
% 8 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/210203

const res = await fetch('https://ip-fd.net/api/v1/asn/210203', {
  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/210203', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/210203');
curl_setopt($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/210203", 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.

AS6762	TELECOM ITALIA SPARKLE S.p.A. SEABONE-NET
AS9002	RETN Limited RETN-AS