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

AS131149

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS131149

NameYUANJHEN-AS-TW

Country

RIRAPNIC

Allocated21.03.2013

Abuse contactchris@host.com.tw

Network Overview

IPv4 Prefixes15

IPv6 Prefixes2

Upstreams (Transit)8

Downstreams (Customers)9

BGP Peers5

AS Path (BGP neighbours)

Upstreams (Transit)

AS137409GSL Networks Pty LTD AS174Cogent Communications, LLC AS18041Taiwan Digital Streaming Co.AS2914NTT America, Inc.AS4780Digital United Inc.AS6939Hurricane Electric LLC+2

AS131149YUANJHEN-AS-TW

Downstreams (Customers)

AS10099China Unicom Global AS137409GSL Networks Pty LTD AS150756Floppy Ltd.AS215256Ming-Lin Yu AS23764China Telecom Global AS3462HiNet (Chunghwa Telecom)+3

Upstreams (Transit) (8)

AS137409GSL Networks Pty LTD

AS174Cogent Communications, LLC

AS18041Taiwan Digital Streaming Co.

AS2914NTT America, Inc.

AS4780Digital United Inc.

AS6939Hurricane Electric LLC

AS7481TWIX Route Servers

AS9676SaveCom Internation Inc.

Downstreams (Customers) (9)

AS10099China Unicom Global

AS137409GSL Networks Pty LTD

AS150756Floppy Ltd.

AS215256Ming-Lin Yu

AS23764China Telecom Global

AS3462HiNet (Chunghwa Telecom)

AS57976Blizzard Entertainment, Inc

AS983Akari Networks LLC

AS9917Li Jing Info Limited

IPv4 Prefixes (15)

43.254.16.0/22

202.12.76.0/23

103.123.196.0/22

103.17.8.0/22

103.129.168.0/23

103.17.8.0/23

43.254.16.0/23

202.12.78.0/23

103.123.192.0/22

103.1.222.0/23

103.17.10.0/23

103.1.220.0/23

43.254.18.0/23

103.1.220.0/22

202.12.76.0/22

IPv6 Prefixes (2)

2407:7100:7000::/36

2407:7100::/32

BGP Peers (5)

AS134823Sky Digital Co., Ltd.

AS24482SG.GS

AS38254Internet Technology Laboratory

AS38855STUIX Route Servers

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.