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

AS9264

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS9264

NameASNet

OrganisationAcademia Sinica

Country

RIRAPNIC

Allocated04.09.2008

Abuse contactnoc@sinica.edu.tw

Network Overview

IPv4 Prefixes3

IPv6 Prefixes2

Upstreams (Transit)16

Downstreams (Customers)10

BGP Peers19

AS Path (BGP neighbours)

Upstreams (Transit)

AS1103SURF B.V.AS1299Arelion (fka. Telia Carrier)AS137409GSL Networks Pty LTD AS15802Emirates Integrated Telecommunications Company PJSC AS17557Pakistan Telecommunication Company Limited AS18041Taiwan Digital Streaming Co.+10

AS9264ASNet

Downstreams (Customers)

AS1659Taiwan Academic Network (TANet) Information Center AS17713National Sun Yat-sen University AS17716National Taiwan University AS18047National Tsing-Hua University AS18181National Health Research Institutes AS18183National Center for Research on Earthquake Engineering+4

Upstreams (Transit) (16)

AS1103SURF B.V.

AS1299Arelion (fka. Telia Carrier)

AS137409GSL Networks Pty LTD

AS15802Emirates Integrated Telecommunications Company PJSC

AS17557Pakistan Telecommunication Company Limited

AS18041Taiwan Digital Streaming Co.

AS20965GEANT Vereniging

AS23855Singapore Advanced Research and Education Network

AS24115Equinix IX

AS24490Trans-Eurasia Information Network (TEIN2) - SG

AS2516KDDI Corporation

AS33891Core-Backbone GmbH

AS6939

AS7539National Center for High-performance Computing

AS7660

AS9505

Downstreams (Customers) (10)

AS1659Taiwan Academic Network (TANet) Information Center

AS17713National Sun Yat-sen University

AS17716National Taiwan University

AS18047National Tsing-Hua University

AS18181National Health Research Institutes

AS18183National Center for Research on Earthquake Engineering

AS18422Industrial Technology Research Institute

AS23855Singapore Advanced Research and Education Network

AS7539National Center for High-performance Computing

AS8674Netnod AB

IPv4 Prefixes (3)

140.109.0.0/16

202.169.160.0/20

103.130.252.0/22

IPv6 Prefixes (2)

2001:c08::/32

2403:c240::/32

BGP Peers (19)

AS133210EN Technologies Pte Ltd

AS134823Sky Digital Co., Ltd.

AS142271EWS DS Networks Inc

AS14907Wikimedia Foundation Inc.

AS17639Converge ICT Solutions Inc.

AS18106Viewqwest Pte Ltd

AS1828PacketFabric / Unitas Global

AS199524Gcore S.A.

AS24482SG.GS

AS35280F5 Networks SARL

AS36236NetActuate, Inc

AS38001NewMedia Express Pte. Ltd.

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.