Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS103

Announcement observedARIN

Northwestern University · NWU-AS

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/16/2026, 03:45:31Snapshot expired

View network topology RDAP registration

ASN: AS103
Registration country: United States
Name: Northwestern University
Abbreviation: NWU-AS
Registration date: 4/9/1987, 04:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
129.105.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.0.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.128.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.160.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.17.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/27/2026, 16:00:00	✓	×	Historical record
165.124.176.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.184.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.186.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.192.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.224.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.232.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
165.124.240.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
192.26.85.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
192.26.86.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
192.31.253.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
192.5.143.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
199.249.165.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
199.249.166.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
199.249.166.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/1/2026, 08:00:00	✓	×	Historical record
199.249.167.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/27/2026, 16:00:00	✓	×	Historical record
199.249.168.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
199.249.168.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/27/2026, 16:00:00	✓	×	Historical record
199.249.169.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/27/2026, 16:00:00	✓	×	Historical record
199.74.64.0/18BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
38.124.97.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
8.28.178.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record
8.30.248.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/16/2026, 00:00:00	✓	×	Historical record

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Northwestern University
RIR: ARIN
Registration country: United States
Registration date: 4/9/1987, 04:00:00
Abuse contact: security@northwestern.edu

Snapshot trend

10/16/2026, 03:45:3122 v43 v610 Upstream · 0 Uncertain

10/3/2026, 09:05:5127 v43 v610 Upstream · 0 Uncertain

9/29/2026, 05:51:4127 v43 v611 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn