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

AS38254

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS38254

NameITLAB-AS-AP

OrganisationPang-Wei Tsai

Country

RIRAPNIC

Allocated08.06.2021

Abuse contactnoc@itlab.cc

Network Overview

IPv4 Prefixes3

IPv6 Prefixes3

Upstreams (Transit)5

Downstreams (Customers)2

BGP Peers9

AS Path (BGP neighbours)

Upstreams (Transit)

AS138997Eons Data Communications Limited AS18423RAID Networks Co., Ltd.AS59105Home NOC Operators Group AS6939Hurricane Electric LLC AS7539National Center for High-performance Computing

AS38254ITLAB-AS-AP

Downstreams (Customers)

AS214821Wen-Ju, Chiang AS9267Pang-Wei Tsai

Upstreams (Transit) (5)

AS138997Eons Data Communications Limited

AS18423RAID Networks Co., Ltd.

AS59105Home NOC Operators Group

AS6939Hurricane Electric LLC

AS7539National Center for High-performance Computing

Downstreams (Customers) (2)

AS214821Wen-Ju, Chiang

AS9267Pang-Wei Tsai

IPv4 Prefixes (3)

103.167.250.0/24

103.129.145.0/24

103.122.119.0/24

IPv6 Prefixes (3)

2403:7f40:e000::/36

2001:df6:c480::/48

2404:c140:956e::/48

BGP Peers (9)

AS134823Sky Digital Co., Ltd.

AS24482SG.GS

AS38855STUIX Route Servers

AS131149Yuan-Jhen Info., Co., Ltd

AS13335Cloudflare, Inc.

AS134823Sky Digital Co., Ltd.

AS17408AboveNet Communications Taiwan

AS17717Ministry of Education Computer Center Taipei, Taiwan

AS7660Asia Pacific Advanced Network - Japan

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.