AS8508 Silesian University of Technology, Computer Centre

Poland SILWEB-AS-EDU RIPE 15 IPv4 prefixes 3 IPv6 prefixes

IPv4 addresses

160,000

IPv6 /48 networks

196,608

RPKI

18 valid0 no ROA

Peers and downstreams

Holder

AS name: SILWEB-AS-EDU
Description: SILWEB Autonomous System - Academic Silesian Regional Computer Network Poland
Organisation: Silesian University of Technology, Computer Centre
Registered in: Gliwice, Poland
Abuse contact: abuse@silweb.pl
Assigned: 1997-10-12
Registered: 1970-01-01
Record last changed: 2019-12-04 11:17 UTC

155.158.0.0/16 157.158.0.0/16 212.106.176.0/20 212.106.183.0/24 212.106.184.0/22 213.227.80.0/20 213.227.88.0/21 213.227.96.0/19 83.230.110.0/24 83.230.118.0/23 83.230.64.0/20 83.230.64.0/21 83.230.96.0/19 83.230.99.0/24 91.220.103.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 85/100

pass	Prefixes covered by valid ROAs 18 of 18 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 3 IPv6 prefixes.	15/15
pass	More than one upstream 4 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@silweb.pl 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 2019-12-04.	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/8508"><img src="https://ip-fd.net/badge/asn/8508/health.svg" alt="AS8508 network health on IP-FD.net"></a>

Markdown

[![AS8508 network health](https://ip-fd.net/badge/asn/8508/health.svg)](https://ip-fd.net/asn/8508)

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

Routing changes

Last 30 days

2026-10-04 19:04 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 19:04 UTC	New neighbour	AS33891	peer
2026-10-04 19:04 UTC	Relationship changed	AS3303	upstream to peer
2026-10-04 19:04 UTC	Relationship changed	AS201054	upstream to peer

WHOIS

aut-num:        AS8508
as-name:        SILWEB-AS-EDU
descr:          SILWEB Autonomous System - Academic
descr:          Silesian Regional Computer Network
descr:          Poland
org:            ORG-CSUo1-RIPE
remarks:        ---------------- UPSTREAM -----------------------------------
remarks:        ---------------- PIONIER ------------------------------------
remarks:        ---------------- PEERINGS -----------------------------------
remarks:        ---------------- import -------------------------------------
remarks:        SASK
remarks:        ---------------- export -------------------------------------
remarks:        SASK
remarks:        ---------------- mp-import ----------------------------------
remarks:        UPSTREAM
remarks:        PIONIER
remarks:        PEERINGS
remarks:        ---------------- mp-export ----------------------------------
remarks:        UPSTREAM
remarks:        PIONIER
remarks:        PEERINGS
remarks:        -------------------------------------------------------------
admin-c:        SASK1-RIPE
tech-c:         SASK1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         PL-CKPOLSL-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2019-12-04T11:17:09Z
source:         RIPE
% 72 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/8508

const res = await fetch('https://ip-fd.net/api/v1/asn/8508', {
  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/8508', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/8508');
curl_setopt($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/8508", 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.

AS6939	Hurricane Electric LLC HURRICANE
AS8501	Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center PIONIER-AS
AS15744	Silesian University of Technology, Computer Centre SILWEB-AS-COM
AS196844	Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center PIONIER-AS-ams-ix

AS3303	Swisscom (Schweiz) AG SWISSCOM
AS6204	TMRC GROUP SRL ZET-NET
AS24482	SG.GS SGGS-AS-AP
AS28917	Fiord Networks, UAB Fiord-AS
AS33891	Core-Backbone GmbH CORE-BACKBONE
AS49544	i3D.net B.V i3Dnet
AS201054	Stowarzyszenie e-Poludnie EPIX-PolMix