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

AS18041

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS18041

NameTWDS-AS-TW

Country

RIRAPNIC

Allocated04.09.2008

Abuse contactliheng@twds.tw

Network Overview

IPv4 Prefixes16

IPv6 Prefixes14

Upstreams (Transit)7

Downstreams (Customers)73

BGP Peers98

AS Path (BGP neighbours)

Upstreams (Transit)

AS10133Chief Telecom Inc.AS137409GSL Networks Pty LTD AS15412Flag Telecom UK Limited AS174Cogent Communications, LLC AS207705Jyun-Kai Hu AS6939Hurricane Electric LLC+1

AS18041TWDS-AS-TW

Downstreams (Customers)

AS10099China Unicom Global AS10310Yahoo Holdings Inc.AS112AS112 Project AS131149Yuan-Jhen Info., Co., Ltd AS131605Inventec Besta CO.,LTD AS131642Pittqiao Network Information Co.,Ltd.+67

Upstreams (Transit) (7)

AS10133Chief Telecom Inc.

AS137409GSL Networks Pty LTD

AS15412Flag Telecom UK Limited

AS174Cogent Communications, LLC

AS207705Jyun-Kai Hu

AS6939Hurricane Electric LLC

AS7713PT Telkom Indonesia Tbk

Downstreams (Customers) (73)

AS10099China Unicom Global

AS10310Yahoo Holdings Inc.

AS112AS112 Project

AS131149Yuan-Jhen Info., Co., Ltd

AS131605Inventec Besta CO.,LTD

AS131642Pittqiao Network Information Co.,Ltd.

AS131645KLICKKLACK CO., LTD.

AS131668Taiwan Digital Streaming Co.

AS134823Sky Digital Co., Ltd.

AS137409GSL Networks Pty LTD

AS138915Kaopu Cloud HK Limited

AS138995Antbox Networks Limited

AS15412Flag Telecom UK Limited

AS16509

AS16552

AS174Cogent Communications, LLC

AS59105Home NOC Operators Group

IPv4 Prefixes (16)

103.220.218.0/23

103.158.186.0/24

157.15.32.0/23

103.236.227.0/24

210.79.150.0/24

103.147.22.0/24

157.15.33.0/24

103.236.226.0/24

211.76.180.0/23

103.220.219.0/24

157.15.32.0/24

210.79.150.0/23

103.236.226.0/23

211.76.180.0/24

211.76.181.0/24

103.147.22.0/23

IPv6 Prefixes (14)

2401:7a60::/32

2405:a640::/32

2a06:a005:500::/44

2400:70e0::/32

2401:16a0::/32

2406:840:f337::/48

2a0e:b107:1310::/44

2406:ee40::/32

2401:a60::/32

2401:55e0::/32

2a0f:607:1051::/48

2401:55a0::/32

2406:bfc0::/32

2602:faad:3::/48

BGP Peers (98)

AS134823Sky Digital Co., Ltd.

AS24482SG.GS

AS38855STUIX Route Servers

AS59105Home NOC Operators Group

AS112AS112 Project

AS11421HYW GLOBAL LLC

AS131149Yuan-Jhen Info., Co., Ltd

AS131596TBC

AS131630Lazco Corporation

AS131642Pittqiao Network Information Co.,Ltd.

AS131657Hong Da Storage Equipment Co., Ltd.

AS131668Taiwan Digital Streaming Co.

AS13335

AS134823Sky Digital Co., Ltd.

AS24482SG.GS

AS59105Home NOC Operators Group

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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.