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

AS3662

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS3662

NameHARNET

OrganisationJoint Universities Computer Centre Limited

Country

RIRAPNIC

Allocated04.09.2008

Abuse contacthartech@jucc.edu.hk

Network Overview

IPv4 Prefixes7

IPv6 Prefixes2

Upstreams (Transit)6

Downstreams (Customers)9

BGP Peers3

AS Path (BGP neighbours)

Upstreams (Transit)

AS137207Joint Universities Computer Centre Limited AS17824Pacific One Net Limited AS number AS39120Convergenze S.p.A.AS4635HKIX Route Servers AS6939Hurricane Electric LLC AS8359MTS PJSC

AS3662HARNET

Downstreams (Customers)

AS17764Hong Kong Metropolitan University AS3363Hong Kong University of Science and Technology AS3661The Chinese University of Hong Kong AS4158City University of Hong Kong AS4528The University of Hong Kong AS4605Hong Kong Baptist University+3

Upstreams (Transit) (6)

AS137207Joint Universities Computer Centre Limited

AS17824Pacific One Net Limited AS number

AS39120Convergenze S.p.A.

AS4635HKIX Route Servers

AS6939Hurricane Electric LLC

AS8359MTS PJSC

Downstreams (Customers) (9)

AS17764Hong Kong Metropolitan University

AS3363Hong Kong University of Science and Technology

AS3661The Chinese University of Hong Kong

AS4158City University of Hong Kong

AS4528The University of Hong Kong

AS4605Hong Kong Baptist University

AS4616The Hong Kong Polytechnic University

AS7650The Education University of Hong Kong

AS7651Lingnan University

IPv4 Prefixes (7)

203.188.112.0/24

202.40.221.0/24

203.188.118.0/24

202.40.218.0/24

192.245.196.0/24

203.188.117.0/24

175.159.254.0/24

IPv6 Prefixes (2)

2001:ce0::/32

2001:ce0:1::/48

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.