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

AS137

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS137

NameASGARR

OrganisationGARR-LIR

Country –

RIRRIPE NCC

Allocated21.08.2002

Abuse contactcert@garr.it

Network Overview

IPv4 Prefixes83

IPv6 Prefixes2

Upstreams (Transit)28

Downstreams (Customers)13

BGP Peers31

AS Path (BGP neighbours)

Upstreams (Transit)

AS1267WIND TRE S.P.A.AS12779IT.Gate S.p.A.AS13030Init7 (Switzerland) Ltd.AS137409GSL Networks Pty LTD AS14840BR.DIGITAL AS15830Equinix, Inc.+22

AS137ASGARR

Downstreams (Customers)

AS12New York University AS16004MIX S.r.L. - Milan Internet eXchange AS199342Universita Cattolica del Sacro Cuore AS200375Istituto Nazionale di Geofisica e Vulcanologia AS20745CNIT Italian National Consortium for Telecommunications AS2597Consiglio Nazionale delle Ricerche+7

Upstreams (Transit) (28)

AS1267WIND TRE S.P.A.

AS12779IT.Gate S.p.A.

AS13030Init7 (Switzerland) Ltd.

AS137409GSL Networks Pty LTD

AS14840BR.DIGITAL

AS15830Equinix, Inc.

AS174Cogent Communications, LLC

AS20965GEANT Vereniging

AS21320GEANT Vereniging

AS22356Durand do Brasil Ltda

AS24482SG.GS

AS24961WIIT AG (fka. myLoc Managed IT AG)

Downstreams (Customers) (13)

AS12New York University

AS16004MIX S.r.L. - Milan Internet eXchange

AS199342Universita Cattolica del Sacro Cuore

AS200375Istituto Nazionale di Geofisica e Vulcanologia

AS20745CNIT Italian National Consortium for Telecommunications

AS2597Consiglio Nazionale delle Ricerche

AS31638Lepida S.c.p.A.

AS35110Regione Basilicata

AS42081European Centre for Medium-Range Weather Forecasts (ECMWF)

AS42165European Commission - Directorate General - Joint Research Centre

AS49976AREA DI RICERCA SCIENTIFICA E TECNOLOGICA DI TRIESTE - AREA SCIENCE PARK

AS5502NATO SACLANT Undersea Research Centre

AS8978

IPv4 Prefixes (83)

130.186.0.0/19

193.206.0.0/16

192.135.32.0/23

150.217.0.0/16

193.43.109.0/24

192.84.128.0/20

131.154.0.0/16

157.27.0.0/16

192.135.34.0/24

193.43.141.0/24

147.122.0.0/16

192.107.100.0/24

130.251.0.0/16

192.135.37.0/24

193.43.116.0/24

192.107.96.0/22

141.250.0.0/16

192.107.52.0/22

192.84.144.0/21

90.147.0.0/16

192.167.59.0/24

160.80.0.0/16

140.164.0.0/16

130.136.0.0/16

192.167.0.0/16

192.146.242.0/24

160.97.0.0/16

151.97.0.0/16

192.106.234.0/24

156.14.0.0/16

193.43.101.0/24

137.204.0.0/16

194.119.192.0/19

156.148.0.0/16

192.135.8.0/21

192.150.196.0/24

141.108.0.0/16

193.204.0.0/15

192.132.34.0/24

158.110.0.0/16

150.178.0.0/16

149.132.0.0/16

193.43.117.0/24

160.78.0.0/16

193.43.18.0/23

192.41.218.0/24

192.148.193.0/24

146.48.0.0/16

192.84.156.0/24

138.41.0.0/16

192.135.35.0/24

150.146.0.0/16

157.138.0.0/16

131.175.0.0/16

192.135.36.0/24

192.133.28.0/24

192.160.156.0/24

143.225.0.0/16

149.139.0.0/16

192.84.127.0/24

192.55.101.0/24

159.149.0.0/16

212.189.128.0/17

192.84.152.0/22

140.105.0.0/16

155.185.0.0/16

130.192.0.0/16

192.107.56.0/21

193.43.97.0/24

192.135.165.0/24

192.107.51.0/24

185.191.180.0/22

147.162.0.0/15

192.135.16.0/20

151.100.0.0/16

193.42.139.0/24

155.253.0.0/16

150.145.0.0/16

192.156.213.0/24

131.114.0.0/16

192.107.64.0/19

192.150.194.0/23

131.175.192.0/18

IPv6 Prefixes (2)

2a00:1620::/32

2001:760::/32

BGP Peers (31)

AS12637Seeweb s.r.l.

AS13237euNetworks GmbH

AS15605Connesi S.p.A.

AS198150SIACOM JSC

AS202032GOLINE SA

AS20811Retelit Digital Services S.p.A.

AS20912Panservice s.a.s. di Cuseo Fabrizio & C.

AS212483LEVEL EIGHTY-SIX COMMUNICATIONS LTD

AS49544i3D.net B.V

AS49605Digital Telecommunication Services S.r.l.

AS49709Videobyte S.r.l.

AS50877Airbeam S.r.l.