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

AS51265

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS51265

NameMASSRESPONSE-AS

OrganisationMASSRESPONSE-MNT

Country –

RIRRIPE NCC

Allocated06.07.2010

Abuse contactabuse@massresponse.com

Network Overview

IPv4 Prefixes26

IPv6 Prefixes1

Upstreams (Transit)43

Downstreams (Customers)1

BGP Peers39

AS Path (BGP neighbours)

Upstreams (Transit)

AS1121VIX Route Server AS12552GlobalConnect (IP-Only)AS137409GSL Networks Pty LTD AS15576NTS workspace AG AS15935ha-vel internet s.r.o.AS15958CETIN Ltd. Belgrade+37

AS51265MASSRESPONSE-AS

Downstreams (Customers)

AS33992Mass Response Service GmbH

Upstreams (Transit) (43)

AS1121VIX Route Server

AS12552GlobalConnect (IP-Only)

AS137409GSL Networks Pty LTD

AS15576NTS workspace AG

AS15935ha-vel internet s.r.o.

AS15958CETIN Ltd. Belgrade

AS1764Next Layer Telecommunications

AS216265ARISTO NETWORKS LTD

AS22356Durand do Brasil Ltda

AS25091IP-Max SA

AS263444Open X Tecnologia Ltda

AS29075IELO-LIAZO SERVICES SAS

Downstreams (Customers) (1)

AS33992Mass Response Service GmbH

IPv4 Prefixes (26)

193.9.252.0/23

185.69.244.0/22

62.240.144.0/21

185.44.52.0/22

83.216.48.0/20

62.240.152.0/21

83.216.48.0/21

62.240.136.0/21

197.211.128.0/18

83.216.60.0/22

197.211.186.0/24

193.9.253.0/24

62.240.135.0/24

62.240.134.0/24

62.240.136.0/24

193.9.252.0/24

83.216.32.0/20

62.240.137.0/24

62.240.128.0/19

41.66.64.0/18

178.157.4.0/22

176.126.39.0/24

62.240.132.0/23

197.211.189.0/24

83.216.32.0/19

62.240.128.0/22

IPv6 Prefixes (1)

2a04:9540::/29

BGP Peers (39)

AS12779IT.Gate S.p.A.

AS13004Serbian Open Exchange DOO

AS13237euNetworks GmbH

AS14630Invesco Group Services, Inc.

AS16347ADISTA SAS

AS17639Converge ICT Solutions Inc.

AS1828PacketFabric / Unitas Global

AS198150SIACOM JSC

AS207841Inferno Communications Ltd

AS212483LEVEL EIGHTY-SIX COMMUNICATIONS LTD

AS215628Xenox IT & Kommunikations GmbH

AS24482SG.GS

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.