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

AS17579

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS17579

NameKREONET2-AS-KR-KR

Country

RIRAPNIC

Abuse contacthostmaster@nic.or.kr

Network Overview

IPv4 Prefixes27

IPv6 Prefixes1

Upstreams (Transit)13

Downstreams (Customers)2

BGP Peers3

AS Path (BGP neighbours)

Upstreams (Transit)

AS1103SURF B.V.AS11537Internet2 AS1237Korea Research Environment Open NETwork AS134148SingAREN AS174Cogent Communications, LLC AS20965GEANT Vereniging+7

AS17579KREONET2-AS-KR-KR

Downstreams (Customers)

AS1237Korea Research Environment Open NETwork AS24482SG.GS

Upstreams (Transit) (13)

AS1103SURF B.V.

AS11537Internet2

AS1237Korea Research Environment Open NETwork

AS134148SingAREN

AS174Cogent Communications, LLC

AS20965GEANT Vereniging

AS24482SG.GS

AS24490Trans-Eurasia Information Network (TEIN2) - SG

AS39120Convergenze S.p.A.

AS4635HKIX Route Servers

AS6939Hurricane Electric LLC

AS7575Australian Academic and Research Network (AARNet)

AS7660

Downstreams (Customers) (2)

AS1237Korea Research Environment Open NETwork

AS24482SG.GS

IPv4 Prefixes (27)

134.75.132.0/24

134.75.102.0/24

134.75.124.0/24

134.75.123.0/24

134.75.252.0/24

134.75.15.0/24

134.75.126.0/24

203.230.1.0/24

134.75.125.0/24

134.75.207.0/24

134.75.105.0/24

134.75.128.0/24

134.75.129.0/24

134.75.200.0/24

134.75.130.0/24

134.75.103.0/24

134.75.107.0/24

210.119.127.0/24

134.75.253.0/24

134.75.131.0/24

134.75.254.0/24

134.75.108.0/24

134.75.16.0/24

210.119.23.0/24

134.75.127.0/24

134.75.1.0/24

134.75.101.0/24

IPv6 Prefixes (1)

2001:320:15::/48

BGP Peers (3)

AS36236NetActuate, Inc

AS49544i3D.net B.V

AS513CERN

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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.