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

AS38819

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS38819

NameHKCSL-AS-AP

OrganisationCSL Limited

Country

RIRAPNIC

Allocated04.09.2008

Abuse contactcorepssupport@pccw.com

Network Overview

IPv4 Prefixes69

IPv6 Prefixes16

Upstreams (Transit)4

Downstreams (Customers)1

BGP Peers3

AS Path (BGP neighbours)

Upstreams (Transit)

AS4635HKIX Route Servers AS4760HKT Limited AS8359MTS PJSC AS9930TIME dotCom Bhd

AS38819HKCSL-AS-AP

Downstreams (Customers)

AS9444Hong Kong Telecommunications (HKT) Limited

Upstreams (Transit) (4)

AS4635HKIX Route Servers

AS4760HKT Limited

AS8359MTS PJSC

AS9930TIME dotCom Bhd

Downstreams (Customers) (1)

AS9444Hong Kong Telecommunications (HKT) Limited

IPv4 Prefixes (69)

110.4.13.0/24

14.0.142.0/24

14.0.132.0/22

14.0.131.0/24

14.0.140.0/24

110.4.11.0/24

110.4.18.0/24

110.4.1.0/24

110.4.8.0/24

203.210.7.0/24

14.0.204.0/23

203.210.0.0/20

14.0.216.0/21

110.4.2.0/24

14.0.176.0/21

110.4.0.0/19

14.0.129.0/24

203.210.3.0/24

14.0.196.0/22

14.0.192.0/24

14.0.240.0/21

14.0.232.0/21

14.0.136.0/24

14.0.206.0/24

110.4.15.0/24

14.0.194.0/24

14.0.160.0/21

110.4.25.0/24

14.0.146.0/24

203.210.6.0/24

14.0.128.0/17

110.4.19.0/24

14.0.182.0/24

110.4.4.0/24

14.0.226.0/24

14.0.145.0/24

14.0.183.0/24

14.0.141.0/24

203.210.2.0/24

14.0.168.0/21

14.0.200.0/24

14.0.143.0/24

14.0.215.0/24

14.0.136.0/22

14.0.193.0/24

14.0.130.0/24

14.0.195.0/24

110.4.17.0/24

14.0.152.0/21

14.0.223.0/24

110.4.9.0/24

110.4.20.0/24

203.210.4.0/24

110.4.21.0/24

110.4.22.0/24

14.0.207.0/24

14.0.167.0/24

14.0.208.0/21

203.210.8.0/24

14.0.166.0/24

14.0.201.0/24

110.4.14.0/24

110.4.0.0/24

14.0.144.0/24

14.0.202.0/23

14.0.224.0/21

14.0.128.0/24

110.4.16.0/24

14.0.247.0/24

IPv6 Prefixes (16)

2403:1000:1100::/40

2403:1000:5100::/40

2403:1000:3100::/40

2403:1000:5300::/40

2403:1000:4100::/40

2403:1000:1300::/40

2403:1000:5000::/36

2403:1000::/32

2403:1000:1000::/36

2405:b200:150::/44

2405:b200:110::/44

2403:1000:4000::/36

2405:b200:140::/44

2405:b200::/32

2403:1000:3000::/36

2403:1000:1200::/40

BGP Peers (3)

AS24482SG.GS

AS36236NetActuate, Inc

AS49544i3D.net B.V

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.