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

AS9505

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS9505

NameTWGATE-AP

OrganisationChunghwa Telecom Co., Ltd.

Country

RIRAPNIC

Allocated04.09.2008

Abuse contactb-noc@cht.com.tw

Network Overview

IPv4 Prefixes34

IPv6 Prefixes10

Upstreams (Transit)48

Downstreams (Customers)109

BGP Peers27

AS Path (BGP neighbours)

Upstreams (Transit)

AS10133Chief Telecom Inc.AS12552GlobalConnect (IP-Only)AS1267WIND TRE S.P.A.AS1299Arelion (fka. Telia Carrier)AS137409GSL Networks Pty LTD AS138997Eons Data Communications Limited+42

AS9505TWGATE-AP

Downstreams (Customers)

AS10111Zeofast Network AS10126Taiwan Internet Gateway AS11414Nvidia Corporation AS12552GlobalConnect (IP-Only)AS1267WIND TRE S.P.A.AS12713Ote SA (Hellenic Telecommunications Organisation)+103

Upstreams (Transit) (48)

AS10133Chief Telecom Inc.

AS12552GlobalConnect (IP-Only)

AS1267WIND TRE S.P.A.

AS1299Arelion (fka. Telia Carrier)

AS137409GSL Networks Pty LTD

AS138997Eons Data Communications Limited

AS15412Flag Telecom UK Limited

AS15802Emirates Integrated Telecommunications Company PJSC

AS174Cogent Communications, LLC

AS17557Pakistan Telecommunication Company Limited

AS17676SoftBank Corp.

AS18041Taiwan Digital Streaming Co.

Downstreams (Customers) (100)

AS10111Zeofast Network

AS10126Taiwan Internet Gateway

AS11414Nvidia Corporation

AS12552GlobalConnect (IP-Only)

AS1267WIND TRE S.P.A.

AS12713Ote SA (Hellenic Telecommunications Organisation)

AS1299Arelion (fka. Telia Carrier)

AS131429MOBIFONE Corporation

AS131447POPIDC powered by CSLoxinfo

AS13150CATO NETWORKS LTD

AS131642Pittqiao Network Information Co.,Ltd.

AS131659NETEASE

AS134823Sky Digital Co., Ltd.

AS1828PacketFabric / Unitas Global

IPv4 Prefixes (34)

175.41.58.0/24

175.41.57.0/24

175.41.49.0/24

175.41.52.0/24

175.111.239.0/24

175.41.48.0/20

175.41.48.0/24

203.160.235.0/24

175.111.235.0/24

203.78.182.0/24

175.41.56.0/24

175.41.51.0/24

203.160.232.0/24

175.41.55.0/24

175.41.61.0/24

203.78.176.0/20

220.128.48.0/21

203.160.231.0/24

175.41.62.0/24

66.171.112.0/21

203.160.224.0/20

208.70.200.0/21

203.160.233.0/24

175.111.240.0/21

175.111.236.0/24

175.41.54.0/24

203.78.179.0/24

175.41.63.0/24

220.128.48.0/24

175.111.224.0/20

203.78.180.0/24

175.111.238.0/24

175.41.50.0/24

175.111.237.0/24

IPv6 Prefixes (10)

2001:b200:600::/40

2606:c00::/32

2001:b200::/32

2001:b200:3e00::/40

2001:b200:2000::/35

2001:b200:1800::/40

2001:b200:3f00::/40

2001:b200:2200::/40

2001:b200:1f00::/40

2001:b200:1e00::/40

BGP Peers (27)

AS13237euNetworks GmbH

AS133210EN Technologies Pte Ltd

AS134823Sky Digital Co., Ltd.

AS142271EWS DS Networks Inc

AS14907Wikimedia Foundation Inc.

AS17639Converge ICT Solutions Inc.

AS18106Viewqwest Pte Ltd

AS1828PacketFabric / Unitas Global

AS19151BroadbandONE, LLC

AS199524Gcore S.A.

AS207841Inferno Communications Ltd

AS213241TECHIT.BE SRL

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.