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

AS7577

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS7577

NameVTC-AS-AP

OrganisationJoint Universities Computer Centre Limited

Country

RIRAPNIC

Allocated04.09.2008

Abuse contacthartech@jucc.edu.hk

Network Overview

IPv4 Prefixes20

IPv6 Prefixes0

Upstreams (Transit)4

Downstreams (Customers)0

BGP Peers3

AS Path (BGP neighbours)

Upstreams (Transit)

AS45474Nexusguard Pte. Ltd.AS4635HKIX Route Servers AS8359MTS PJSC AS9304HGC Global Communications Limited

AS7577VTC-AS-AP

Downstreams (Customers)

none

Upstreams (Transit) (4)

AS45474Nexusguard Pte. Ltd.

AS4635HKIX Route Servers

AS8359MTS PJSC

AS9304HGC Global Communications Limited

IPv4 Prefixes (20)

202.40.208.0/21

202.75.82.0/24

202.75.90.0/24

202.75.81.0/24

202.75.86.0/24

202.75.89.0/24

202.75.86.0/23

202.20.100.0/23

202.40.211.0/24

202.40.215.0/24

202.75.80.0/24

202.75.88.0/24

202.75.87.0/24

202.75.93.0/24

202.75.85.0/24

202.75.91.0/24

202.75.83.0/24

192.94.174.0/24

202.40.210.0/24

202.75.84.0/24

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.