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ASN Lookup Tool
AS103 NWU-AS

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS103
Organisation
Northwestern University
Name
NWU-AS
Total IPv4 Addresses
149,500
Total IPv4 Prefixes
34
Total IPv6 Prefixes
1
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#1,345 out of 77,684
Registry
Arin
Registered Country
US flag US
Registered Country Name
United States of America (the)
Registered Date
1987-04-09
Registration Last Change
2012-04-02
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS396450
US flagInternet2
AS3356
US flagLevel 3 Parent, LLC
AS174
US flagCogent Communications
AS293
US flagESnet
AS2381
US flagWiscNet
Showing 5 of 10
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix8.28.178.0/23
Range From8.28.178.0
Range To8.28.179.255
Prefix8.30.248.0/22
Range From8.30.248.0
Range To8.30.251.255
Prefix38.124.97.0/24
Range From38.124.97.0
Range To38.124.97.255
Prefix129.105.0.0/16
Range From129.105.0.0
Range To129.105.255.255
Prefix165.124.0.0/20
Range From165.124.0.0
Range To165.124.15.255
Showing 5 of 34
IPv6 Active Prefixes
Prefix2620:10d:2000::/41
Range From2620:10d:2000::
Range To2620:10d:207f:ffff:ffff:ffff:ffff:ffff
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.