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

AS7660

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS7660

NameAPAN-JP

Country

RIRAPNIC

Abuse contacthostmaster@nic.ad.jp

Network Overview

IPv4 Prefixes2

IPv6 Prefixes2

Upstreams (Transit)7

Downstreams (Customers)18

BGP Peers8

AS Path (BGP neighbours)

Upstreams (Transit)

AS11537Internet2 AS23855Singapore Advanced Research and Education Network AS24287National Institute of Informatics AS2500WIDE Project AS2516KDDI Corporation AS2907Science Information Network+1

AS7660APAN-JP

Downstreams (Customers)

AS11537Internet2 AS137207Joint Universities Computer Centre Limited AS17579KISTI AS18125Tsukuba Business-Academia Cooperation Support Center,AS23855Singapore Advanced Research and Education Network AS23911China Next Generation Internet Beijing IX+12

Upstreams (Transit) (7)

AS11537Internet2

AS23855Singapore Advanced Research and Education Network

AS24287National Institute of Informatics

AS2500WIDE Project

AS2516KDDI Corporation

AS2907Science Information Network

AS6939Hurricane Electric LLC

Downstreams (Customers) (18)

AS11537Internet2

AS137207Joint Universities Computer Centre Limited

AS17579KISTI

AS18125Tsukuba Business-Academia Cooperation Support Center,

AS23855Singapore Advanced Research and Education Network

AS23911China Next Generation Internet Beijing IX

AS24287National Institute of Informatics

AS24475ThaiREN.Thailand Research and Education Network Thailand

AS24490Trans-Eurasia Information Network (TEIN2) - SG

AS2500WIDE Project

AS2516KDDI Corporation

AS2907Science Information Network

IPv4 Prefixes (2)

203.181.248.0/23

203.181.194.0/23

IPv6 Prefixes (2)

2001:200:900::/40

2001:200:e000::/35

BGP Peers (8)

AS1828PacketFabric / Unitas Global

AS24482SG.GS

AS35280F5 Networks SARL

AS36236NetActuate, Inc

AS38254Internet Technology Laboratory

AS4777Asia Pacific Network Information Centre

AS49544i3D.net B.V

AS59105Home NOC Operators Group

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.