AS50522 Sewan Nederland B.V.

Netherlands SEWAN-NL RIPE 11 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

16,384

IPv6 /48 networks

65,536

RPKI

12 valid0 no ROA

Peers and downstreams

112

Holder

AS name: SEWAN-NL
Description: Sewan Nederland B.V.
Organisation: Sewan Nederland B.V.
Abuse contact: abuse@sewan.nl
Assigned: 2010-02-01
Registered: 2010-02-02
Record last changed: 2026-05-11 21:14 UTC

109.235.32.0/21 185.61.68.0/22 81.173.0.0/22 81.173.125.0/24 81.173.126.0/23 81.173.32.0/22 81.173.48.0/20 81.173.64.0/20 81.173.7.0/24 81.173.96.0/22 81.23.244.0/22

AS559	SWITCH Switch
AS1031	PEER 1031 LLC PEER1-1031
AS1103	SURF B.V. SURFNET-NL
AS1140	Stichting Internet Domeinregistratie Nederland SIDN
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH NEXTLAYER-AS
AS1828	Unitas Global UNITAS
AS3212	Telemach Slovenija d.o.o. TELEMACH
AS3333	Reseaux IP Europeens Network Coordination Centre (RIPE NCC) RIPE-NCC-AS
AS3399	Obenet AB OBE-NET
AS4455	IX Reach Ltd BSO
AS5405	Inter.link GmbH INTERDOTLINK
AS6057	Administracion Nacional de Telecomunicaciones AS6057
AS6204	TMRC GROUP SRL ZET-NET
AS6424	EDGOO NETWORKS UNIPESSOAL LDA EDGOO
AS6663	Euroweb Romania S.R.L. TTI-NET
AS6696	VERIXI SA VERIXI
AS6797	GlobalConnect AB GLOBALCONNECT-NET
AS8218	Zayo Infrastructure France SA NEO-ASN
AS8298	IPng Networks GmbH IPNG
AS8529	Zain Omantel International FZ-LLC OMANTEL-AS
AS9002	RETN Limited RETN-AS
AS9044	BSE Software GmbH SOLNET
AS12637	SEEWEB s.r.l. SEEWEB
AS12779	IT.Gate S.p.A. ITGATE
AS12859	BIT BV NL-BIT
AS12969	Ljosleidarinn ehf Vodafone_Iceland
AS13237	euNetworks GmbH LAMBDANET-AS
AS14630	Invesco Group Services, Inc. INVESCO
AS14840	BR.Digital Telecom AS14840
AS14907	Wikimedia Foundation Inc. WIKIMEDIA
AS15547	netplus.ch SA NETPLUS
AS15576	NTS workspace AG NTS
AS15605	Connesi s.p.a. CONNESI
AS15958	CETIN Ltd. Belgrade CETIN_doo_AS
AS17639	Converge ICT Solutions Inc. CONVERGE-AS
AS18106	Viewqwest Pte Ltd VIEWQWEST-SG-AP
AS20485	Joint Stock Company TransTeleCom TRANSTELECOM
AS20764	CJSC RASCOM RASCOM-AS
AS20932	Services Industriels de Geneve SIG-ST
AS24482	SG.GS SGGS-AS-AP
AS24961	WIIT AG MYLOC-AS
AS25091	IP-Max SA IP-Max
AS25160	Vorboss Limited VORBOSS
AS25220	equada network GmbH GLOBALNOC-AS
AS28917	Fiord Networks, UAB Fiord-AS
AS29075	IELO-LIAZO SERVICES SAS IELO
AS29140	Hostserver GmbH HOSTSERVER-AS
AS29632	Netassist International EOOD NASSIST-AS
AS30844	Liquid Telecommunications Ltd LIQUID-AS
AS33891	Core-Backbone GmbH CORE-BACKBONE
AS34019	Hivane Association HIVANE
AS34177	Celeste SAS CELESTE-AS
AS34288	Kantonsschule Zug AS34288
AS34927	iFog GmbH iFog-GmbH
AS35280	F5 Networks SARL F5
AS36236	NetActuate, Inc NETACTUATE
AS37100	SEACOM Limited
AS37468	Angola Cables
AS37497	Network Platforms (PTY) LTD
AS37721	Virtual Technologies & Solutions
AS39122	Blacknight Internet Solutions Limited BLACKNIGHT-AS
AS39249	Netassist International EOOD KICUA-AS
AS39351	31173 Services AB ESAB-AS
AS41327	Fiber Telecom S.p.A. FIBERTELECOM-AS
AS41666	Institute for Pyrotechnical Cleaning (limited company) PYRO-AS
AS42541	Fiberby ApS FIBERBY
AS44901	Belcloud LTD belcloud
AS45489	Sri Lanka Telecom PLC, GLobal Peering SLT-GLOBAL
AS47147	Anexia Cloud Solutions GmbH AS-ANX
AS48185	team.blue NV team_blue
AS48362	Tkswf TKSWF-AS
AS48646	SDRmedia Verwaltungs GmbH STEFAN6
AS48919	UACITY Ltd. UA-CITY-AS
AS49434	FBW NETWORKS SAS FBWNETWORKS
AS49544	i3D.net B.V i3Dnet
AS49605	Digital Telecommunication Services S.r.l. DTS-AS
AS50300	CustodianDC Limited CUSTDC
AS50629	LWLcom GmbH LWLCOM
AS50673	Serverius Holding B.V. Serverius-as
AS50763	Robert McKay MCKAYCOM
AS51088	A2B IP B.V. A2B
AS51184	Fonira Telekom GmbH FONIRA
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS51873	Arcade Solutions AG AS-ARCADE
AS56662	Eutpnet EUTPNET
AS56911	Warian S.R.L. ASN-WARIAN
AS56987	ABACLOUDA SAS AS-ABACLOUDA
AS58057	Securebit AG SECUREBIT
AS61573	IP TELECOM AS61573
AS62167	Tismi BV Tismi
AS64475	Freifunk Frankfurt am Main e.V. FREIFUNK-FRANKFURT
AS198150	SIACOM JSC SIACOM-AS
AS199524	G-Core Labs S.A. GCORE
AS199938	Netzwerge GmbH NETZWERGE
AS200342	24x7 Hosting B.V. AS-24X7ICT
AS201117	ZeroPlex B.V. ZeroPlex
AS202365	Omer GOLGELI Chronos
AS204092	Association GRIFON GRIFON
AS205112	PHILUNET GmbH PHILUNET
AS205206	Netsite A/S Netsite
AS209022	Tschajera Limited Tschajera-Limited
AS209090	Association Stolon STOLON
AS209823	Enki Multimedia EURL ENKI-AS
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD level86
AS212635	Jurrian van Iersel AS212635
AS213241	TECHIT.BE SRL TECHIT
AS263152	MIGO TELECOM AS263152
AS271253	LINK BRASIL TELECOMUNICACOES LTDA AS271253

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 90/100

pass	Prefixes covered by valid ROAs 12 of 12 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
pass	More than one upstream 4 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@sewan.nl 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 2026-05-11.	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/50522"><img src="https://ip-fd.net/badge/asn/50522/health.svg" alt="AS50522 network health on IP-FD.net"></a>

Markdown

[![AS50522 network health](https://ip-fd.net/badge/asn/50522/health.svg)](https://ip-fd.net/asn/50522)

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

Routing changes

Last 30 days

2026-10-04 23:12 UTC	Neighbour gone	AS205103	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS137409	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS58299	peer
2026-10-04 23:12 UTC	Neighbour gone	AS50869	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS49917	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS41051	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS31027	peer
2026-10-04 23:12 UTC	Neighbour gone	AS22356	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS12552	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS7713	upstream
2026-10-04 23:12 UTC	Neighbour gone	AS3462	upstream
2026-10-04 23:12 UTC	New neighbour	AS8529	peer
2026-10-04 23:12 UTC	Relationship changed	AS47147	upstream to peer
2026-10-04 23:12 UTC	New neighbour	AS44901	peer
2026-10-04 23:12 UTC	New neighbour	AS213241	peer
2026-10-04 23:12 UTC	Relationship changed	AS9044	upstream to peer
2026-10-04 23:12 UTC	New neighbour	AS9002	peer
2026-10-04 23:12 UTC	Relationship changed	AS8298	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 23:12 UTC	New neighbour	AS6797	peer
2026-10-04 23:12 UTC	Relationship changed	AS6696	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 23:12 UTC	New neighbour	AS6057	peer
2026-10-04 23:12 UTC	Relationship changed	AS58057	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS56911	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS5405	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS50673	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS48646	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS48362	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS41327	upstream to peer
2026-10-04 23:12 UTC	New neighbour	AS39249	peer
2026-10-04 23:12 UTC	Relationship changed	AS37497	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS37468	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS37100	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS35280	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS34177	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS34019	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS33891	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS30844	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS29632	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS25091	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS24961	upstream to peer
2026-10-04 23:12 UTC	New neighbour	AS209090	peer
2026-10-04 23:12 UTC	Relationship changed	AS209022	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS20764	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS20485	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS15958	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS15576	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS1299	downstream to upstream
2026-10-04 23:12 UTC	Relationship changed	AS12779	upstream to peer
2026-10-04 23:12 UTC	Relationship changed	AS1031	upstream to peer

WHOIS

aut-num:        AS50522
as-name:        SEWAN-NL
org:            ORG-PB32-RIPE
remarks:        Transits
remarks:        Peering
remarks:        Customers
admin-c:        SWN50522
tech-c:         SWN50522
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SEWAN-NL-MNT
created:        2010-02-02T14:34:53Z
last-modified:  2026-05-11T21:14:35Z
source:         RIPE
% 62 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/50522

const res = await fetch('https://ip-fd.net/api/v1/asn/50522', {
  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/50522', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/50522');
curl_setopt($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/50522", 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.

AS1299	Arelion Sweden AB TWELVE99
AS3356	Level 3 Parent, LLC LEVEL3
AS6939	Hurricane Electric LLC HURRICANE
AS20562	Broadband Hosting B.V. OPEN-PEERING-AS

AS41960	Nextpertise B.V. NEXTPERTISE
AS61349	MaxiTEL Telecom B.V. MAXITEL
AS200342	24x7 Hosting B.V. AS-24X7ICT
AS201117	ZeroPlex B.V. ZeroPlex