Autonomous system
AS23719 USYD-AS-AP University of Sydney
Unclassified APNIC
Summary
University of Sydney
education business academic
The AS handle USYD-AS-AP is operated by the University of Sydney.
What it's used for
- The address space carries university infrastructure, as indicated by the netname
UNISYD-AUand registrant "University of Sydney" for both announced prefixes. - The network announces 65,792 IPv4 addresses across 2 prefixes (129.78.0.0/16 and 203.32.106.0/24) with only 1 observed neighbour, a ratio typical of an access or internal corporate estate rather than a transit provider.
Notable
- Registrants for both prefixes align perfectly with the announcer, listing "University of Sydney" and the IRT contact
IRT-UNIVERSITYOFSYDNEY-AU. - The inventory consists of one large /16 block and one smaller /24 block, reflecting a standard academic network allocation.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS7575 | Australian Academic and Research Network (AARNet) | 62 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 65.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| AU | Australia | 1 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS23719- Registry name
- USYD-AS-AP
- Registrant
- Australian Academic and Research Network
- Abuse contact
- abuse@aarnet.edu.au
- Registered
- 2008-09-04
- Last changed
- 2020-06-22
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 1 authorising AS23719
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 8 naming AS23719
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,781 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere