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

AS2381

ASN

ARIN

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS2381

NameWISCNET1-AS

OrganisationWiscNet

Country –

RIRARIN

Allocated03.02.1993

Abuse contactabuse@wiscnet.net

Network Overview

IPv4 Prefixes37

IPv6 Prefixes2

Upstreams (Transit)12

Downstreams (Customers)34

BGP Peers7

AS Path (BGP neighbours)

Upstreams (Transit)

AS11164Internet2 I2PX AS11537Internet2 AS1299Arelion (fka. Telia Carrier)AS137409GSL Networks Pty LTD AS286GTT Communications Inc.AS293ESnet+6

AS2381WISCNET1-AS

Downstreams (Customers)

AS103Northwestern University AS11500Milwaukee School of Engineering AS14192Carthage College AS1736Marquette University AS19782Indiana University (GigaPOP)AS2041St. Norbert College+28

Upstreams (Transit) (12)

AS11164Internet2 I2PX

AS11537Internet2

AS1299Arelion (fka. Telia Carrier)

AS137409GSL Networks Pty LTD

AS286GTT Communications Inc.

AS293ESnet

AS29838Atlantic Metro Communications II, Inc.

AS3257GTT Communications Inc.

AS32621Twin City VoIP, Inc.

AS3303Swisscom (Schweiz) AG

AS6939Hurricane Electric LLC

AS8220COLT

Downstreams (Customers) (34)

AS103Northwestern University

AS11500Milwaukee School of Engineering

AS14192Carthage College

AS1736Marquette University

AS19782Indiana University (GigaPOP)

AS2041St. Norbert College

AS22066City of Eau Claire

AS22137Blood Center of Wisconsin, Inc.

AS22971ST. VINCENT HOSPITAL OF THE HOSPITAL SISTERS OF THE THIRD ORDER OF ST. FRANCIS

AS23301State of Wisconsin Investment Board

AS25979CITY OF MADISON

AS26415VeriSign Global Registry Services

IPv4 Prefixes (37)

144.89.0.0/18

204.128.237.0/24

204.128.233.0/24

216.56.0.0/16

148.59.44.0/24

160.32.0.0/22

204.128.241.0/24

192.206.48.0/24

199.233.142.0/24

204.145.232.0/24

204.128.240.0/24

143.109.192.0/19

199.248.186.0/24

199.233.45.0/24

64.189.15.0/24

199.233.44.0/24

204.128.242.0/24

165.128.0.0/16

140.104.0.0/16

204.128.236.0/24

192.156.230.0/24

204.128.235.0/24

204.128.238.0/24

199.242.176.0/24

140.189.0.0/16

204.128.234.0/24

198.150.0.0/16

205.213.0.0/16

199.197.64.0/18

216.56.252.0/23

143.109.64.0/19

199.233.84.0/24

199.233.86.0/24

170.125.0.0/16

199.233.44.0/23

170.125.238.0/23

208.85.28.0/22

IPv6 Prefixes (2)

2001:4e0::/32

2620:11f:f000::/40

BGP Peers (7)

AS14907Wikimedia Foundation Inc.

AS1828PacketFabric / Unitas Global

AS19151BroadbandONE, LLC

AS24482SG.GS

AS35280F5 Networks SARL

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.