An Autonomous System Number (ASN) is a unique number assigned to a network in global internet routing. Every provider that participates directly on the internet has its own ASN (e.g. AS15169 for Google).

What are upstreams, peers and prefixes?

Upstreams are transit providers through which an AS reaches the internet. Peers are networks with direct traffic exchange. Prefixes are the IP address ranges the AS announces via BGP.

Where does the ASN data come from?

The data comes from the official RDAP services of the RIRs (RIPE, ARIN, etc.) and from RIPEstat (prefixes and neighbour ASNs).

ASN Lookup – Networks, Upstreams and Prefixes

AS8508

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS8508

NameSILWEB-AS-EDU

OrganisationSilesian University of Technology, Computer Centre

Country –

RIRRIPE NCC

Allocated01.01.1970

Abuse contactabuse@silweb.pl

Network Overview

IPv4 Prefixes15

IPv6 Prefixes3

Upstreams (Transit)7

Downstreams (Customers)0

BGP Peers3

AS Path (BGP neighbours)

Upstreams (Transit)

AS15744Silesian University of Technology, Computer Centre AS196844Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center AS201054Stowarzyszenie e-Poludnie AS3303Swisscom (Schweiz) AG AS6204INTERKVM HOST SRL AS6939Hurricane Electric LLC+1

AS8508SILWEB-AS-EDU

Downstreams (Customers)

none

Upstreams (Transit) (7)

AS15744Silesian University of Technology, Computer Centre

AS196844Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center

AS201054Stowarzyszenie e-Poludnie

AS3303Swisscom (Schweiz) AG

AS6204INTERKVM HOST SRL

AS6939Hurricane Electric LLC

AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center

IPv4 Prefixes (15)

212.106.176.0/20

83.230.64.0/21

83.230.118.0/23

213.227.88.0/21

157.158.0.0/16

91.220.103.0/24

83.230.99.0/24

83.230.96.0/19

83.230.64.0/20

213.227.80.0/20

155.158.0.0/16

212.106.184.0/22

212.106.183.0/24

83.230.110.0/24

213.227.96.0/19

IPv6 Prefixes (3)

2a01:1dd::/32

2a01:1dc::/32

2a01:1de::/32

BGP Peers (3)

AS24482SG.GS

AS28917Fiord Networks, UAB

AS49544i3D.net B.V

My IP ASN Lookup IP Lookup WHOIS DNS Lookup

What is an ASN?

An Autonomous System Number (ASN) is a unique number assigned to a network on the internet. Upstreams are the transit providers through which the AS reaches the internet. Peers are networks with which direct traffic exchange takes place. Prefixes are the IP address ranges that the AS announces to the internet. Data via RIPE NCC RDAP and RIPEstat API.