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

AS18125

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS18125

NameMAFFIN

Country

RIRAPNIC

Abuse contacthostmaster@nic.ad.jp

Network Overview

IPv4 Prefixes1

IPv6 Prefixes0

Upstreams (Transit)4

Downstreams (Customers)1

BGP Peers8

AS Path (BGP neighbours)

Upstreams (Transit)

AS2907Science Information Network AS4713NTT Communications Corporation (OCN)AS6939Hurricane Electric LLC AS7660Asia Pacific Advanced Network - Japan

AS18125MAFFIN

Downstreams (Customers)

AS10010TOKAI Communications Corporation

Upstreams (Transit) (4)

AS2907Science Information Network

AS4713NTT Communications Corporation (OCN)

AS6939Hurricane Electric LLC

AS7660Asia Pacific Advanced Network - Japan

Downstreams (Customers) (1)

AS10010TOKAI Communications Corporation

IPv4 Prefixes (1)

150.26.0.0/16

BGP Peers (8)

AS1828PacketFabric / Unitas Global

AS24482SG.GS

AS35280F5 Networks SARL

AS36236NetActuate, Inc

AS38001NewMedia Express Pte. Ltd.

AS4777Asia Pacific Network Information Centre

AS49544i3D.net B.V

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.