AS2 University of Delaware
AS2 is operated by University of Delaware and registered with ARIN (US) since 1991-01-10.
It announces 9 IPv4 and 0 IPv6 prefixes, 11% of them RPKI valid.
RIPE RIS sees 10 upstream and peer networks and 4 downstream networks next to it.
| Name | University of Delaware |
|---|---|
| Registry handle | UDEL-DCN |
| Registry (RIR) | ARIN |
| Country | United States (US) |
| Delegated on | 1991-01-10 |
| Prefixes (IPv4 / IPv6) | 9 / 0 |
| RPKI valid | 11% (1 / 9) |
| Upstreams and peers | 10 |
| Downstream networks | 4 |
Routing health
- AS2 announces 9 IPv4 and 0 IPv6 prefixes.
- No IPv6 prefixes announced.
- 1 of 9 announced prefixes are RPKI valid.
- 8 announced prefixes are not covered by a ROA of AS2 (they may have none, or another network’s).
- 10 upstreams and peers, 4 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 9
- 91.143.144.0/20
- 128.4.0.0/16
- 171.79.128.0/20
- 171.79.144.0/20
- 189.39.185.0/24
- 189.76.77.0/24
- 194.190.53.0/24
- 194.190.54.0/24
- 196.13.136.0/24
Upstreams and peers 10
The networks RIPE RIS sees next to AS2 in BGP paths, the most visible first.
Peering
AS2 is not in PeeringDB. Networks that peer at internet exchanges are expected to keep a record there with their policy, exchange addresses and contacts.
More about AS2
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-15 15:18 UTC. The country is where the AS number was registered, not necessarily where the network operates.