AS1133 SURF B.V.

Netherlands UTWENTE-AS RIPE 1 IPv4 prefix 1 IPv6 prefix

IPv4 addresses

65,536

IPv6 /48 networks

RPKI

2 valid0 no ROA

Peers and downstreams

Holder

AS name: UTWENTE-AS
Description: University Twente Drienerlolaan 5 P.O. Box 217 NL - 7500 AE Enschede
Organisation: SURF B.V.
Registered in: Utrecht, Netherlands
Abuse contact: cert@surfcert.nl
Assigned: 1993-08-31
Registered: 2002-08-21
Record last changed: 2017-06-12 14:47 UTC

130.89.0.0/16

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 85/100

pass	Prefixes covered by valid ROAs 2 of 2 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 2 upstreams seen in BGP.	10/10
pass	Working abuse contact cert@surfcert.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
fail	Registry record maintained Last changed 2017-06-12.	0/5

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/1133"><img src="https://ip-fd.net/badge/asn/1133/health.svg" alt="AS1133 network health on IP-FD.net"></a>

Markdown

[![AS1133 network health](https://ip-fd.net/badge/asn/1133/health.svg)](https://ip-fd.net/asn/1133)

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

Routing changes

Last 30 days

2026-10-04 11:36 UTC	Neighbour gone	AS56655	upstream
2026-10-04 11:36 UTC	New neighbour	AS28917	peer
2026-10-04 11:36 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 11:36 UTC	Relationship changed	AS50304	upstream to peer
2026-10-04 11:36 UTC	New neighbour	AS20326	peer

WHOIS

aut-num:        AS1133
as-name:        UTWENTE-AS
descr:          University Twente
descr:          Drienerlolaan 5
descr:          P.O. Box 217
descr:          NL - 7500 AE Enschede
admin-c:        Ins20-RIPE
tech-c:         Ins20-RIPE
status:         LEGACY
mnt-by:         SN-LIR-MNT
created:        2002-08-21T16:06:37Z
last-modified:  2017-06-12T14:47:02Z
source:         RIPE
mnt-by:         RIPE-NCC-LEGACY-MNT
org:            ORG-Sb3-RIPE

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/1133

const res = await fetch('https://ip-fd.net/api/v1/asn/1133', {
  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/1133', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/1133');
curl_setopt($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/1133", 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.

AS1103	SURF B.V. SURFNET-NL
AS35133	Eranium B.V. ERANIUM

AS3399	Obenet AB OBE-NET
AS6663	Euroweb Romania S.R.L. TTI-NET
AS12859	BIT BV NL-BIT
AS20326	TeraSwitch Networks Inc. TERASWITCH
AS24482	SG.GS SGGS-AS-AP
AS24961	WIIT AG MYLOC-AS
AS28917	Fiord Networks, UAB Fiord-AS
AS36236	NetActuate, Inc NETACTUATE
AS39122	Blacknight Internet Solutions Limited BLACKNIGHT-AS
AS41327	Fiber Telecom S.p.A. FIBERTELECOM-AS
AS50304	Blix Solutions AS BLIX
AS50629	LWLcom GmbH LWLCOM
AS209823	Enki Multimedia EURL ENKI-AS