Autonomous system profile

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

AS2

Announcement observedARIN

University of Delaware · UDEL-DCN

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

Last active10/11/2026, 01:25:12Snapshot expired

View network topology RDAP registration

ASN: AS2
Registration country: United States
Name: University of Delaware
Abbreviation: UDEL-DCN
Registration date: 1/10/1991, 05:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
103.151.182.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 16:00:00	9/24/2026, 16:00:00	✓	×	Historical record
103.39.120.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/23/2026, 00:00:00	9/23/2026, 16:00:00	✓	×	Historical record
128.4.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/10/2026, 16:00:00	✓	×	Historical record
171.79.128.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/10/2026, 16:00:00	✓	×	Historical record
171.79.144.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/10/2026, 16:00:00	✓	×	Historical record
189.39.185.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/30/2026, 16:00:00	✓	×	Historical record
189.76.77.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/22/2026, 08:00:00	10/10/2026, 16:00:00	✓	×	Historical record
193.242.191.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 08:00:00	9/24/2026, 08:00:00	✓	×	Historical record
194.190.53.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/10/2026, 16:00:00	✓	×	Historical record
194.190.54.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/10/2026, 16:00:00	✓	×	Historical record
196.13.136.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/10/2026, 16:00:00	✓	×	Historical record
91.143.144.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/10/2026, 16:00:00	✓	×	Historical record

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

Registration and sources

Organization: University of Delaware
RIR: ARIN
Registration country: United States
Registration date: 1/10/1991, 05:00:00
Abuse contact: noc@udel.edu

Snapshot trend

10/11/2026, 01:25:129 v40 v611 Upstream · 0 Uncertain

9/29/2026, 05:48:0012 v41 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