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

AS23836

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS23836

NameRELNET

Country

RIRAPNIC

Abuse contacthostmaster@nic.ad.jp

Network Overview

IPv4 Prefixes2

IPv6 Prefixes1

Upstreams (Transit)3

Downstreams (Customers)0

BGP Peers2

AS Path (BGP neighbours)

Upstreams (Transit)

AS10010TOKAI Communications Corporation AS6939Hurricane Electric LLC AS9622Kurashiki Cable TV

AS23836RELNET

Downstreams (Customers)

none

Upstreams (Transit) (3)

AS10010TOKAI Communications Corporation

AS6939Hurricane Electric LLC

AS9622Kurashiki Cable TV

IPv4 Prefixes (2)

202.142.8.0/21

203.99.224.0/21

IPv6 Prefixes (1)

2001:44a8::/32

BGP Peers (2)

AS35280F5 Networks SARL

AS59105Home NOC Operators Group

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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.