ASN Lookup – Networks, Upstreams and Prefixes

AS101

ASN

ARIN

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS101

NameWASH-NSF-AS

OrganisationUniversity of Washington

Country –

RIRARIN

Allocated31.03.1987

Network Overview

IPv4 Prefixes4

IPv6 Prefixes4

Upstreams IPv410

BGP Peers IPv446

Upstreams (Transit Providers)

IPv4

AS11164 INTERNET2-I2PX

AS11537 INTERNET2-RESEARCH-EDU

AS137409 GSLNETWORKS-AS-AP

AS174 COGENT-174

AS2497 IIJ

AS293 ESNET

AS3356 LEVEL3

AS3491 PCCWG-APAC-HK

AS35179 KORBANK-AS

AS394256 CLOUDSINGULARITY

IPv4 Prefixes (4 total)

207.231.240.0/20

209.124.184.0/21

209.124.176.0/21

209.124.176.0/20

IPv6 Prefixes (4 total)

2001:1860::/32

2001:1860:4000::/34

2001:1860:8000::/34

2001:504:b::/48

BGP Peers IPv4 (46 total, showing 20)

AS10430

AS11548

AS11649

AS11956

AS13476

AS14221

AS14954

AS17200

AS19014

AS3428

AS3807

AS40272

AS4193

AS44855

AS53472

AS54429

AS65005

AS73

AS7774

AS18106

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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.