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

AS24490

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS24490

NameTEIN2-SG-AP

Country

RIRAPNIC

Allocated04.09.2008

Abuse contactabuse@cernet.edu.cn

Network Overview

IPv4 Prefixes0

IPv6 Prefixes0

Upstreams (Transit)8

Downstreams (Customers)16

BGP Peers1

AS Path (BGP neighbours)

Upstreams (Transit)

AS11537Internet2 AS141682APIDT Infrastructure Pty Ltd AS20965GEANT Vereniging AS23855Singapore Advanced Research and Education Network AS24287National Institute of Informatics AS7575Australian Academic and Research Network (AARNet)+2

AS24490TEIN2-SG-AP

Downstreams (Customers)

AS11537Internet2 AS139588Institute of Technology of Cambodia AS141682APIDT Infrastructure Pty Ltd AS17579KISTI AS20965GEANT Vereniging AS23855Singapore Advanced Research and Education Network+10

Upstreams (Transit) (8)

AS11537Internet2

AS141682APIDT Infrastructure Pty Ltd

AS20965GEANT Vereniging

AS23855Singapore Advanced Research and Education Network

AS24287National Institute of Informatics

AS7575Australian Academic and Research Network (AARNet)

AS7660Asia Pacific Advanced Network - Japan

AS9885NKN INTERNET GATEWAY NETWORK

Downstreams (Customers) (16)

AS11537Internet2

AS139588Institute of Technology of Cambodia

AS141682APIDT Infrastructure Pty Ltd

AS17579KISTI

AS20965GEANT Vereniging

AS23855Singapore Advanced Research and Education Network

AS24287National Institute of Informatics

AS24489Trans-Eurasia Information Network (TEIN2) - North

AS24514MINISTRY OF HIGHER EDUCATION MALAYSIA

AS38229Lanka Education & Research Network, NREN

AS45773Pakistan Educational Research Network

AS63961Bangladesh Research and Education Network (BdREN)

AS7575Australian Academic and Research Network (AARNet)

AS9264

AS9270

AS9885NKN INTERNET GATEWAY NETWORK

BGP Peers (1)

AS38229Lanka Education & Research Network, NREN

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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.