Autonomous system
AS23767 A-STAR-AS-AP A-STAR
Unclassified APNIC
Summary
A*STAR
research government business infrastructure
The AS handle A-STAR-AS-AP is held by **ASTAR*, the Agency for Science, Technology and Research.
What it's used for
- The address space carries research and institutional infrastructure, evidenced by netnames such as
A-STAR-AS-AP,IHPCNET, andACRC-NETWORK. - The AS announces 8192 IPv4 addresses across 11 prefixes and 1 IPv6 prefix, with 7 observed neighbours, indicating a self-contained internal corporate estate rather than a transit or access network.
Notable
- Registrants are consistent with the announcer, primarily
IRT-A-STAR-SGfor A*STAR, with some prefixes registered toIRT-ACRC-SGfor IHPC (Institute of High Performance Computing). - The address inventory is finely subdivided into multiple /22 and /24 blocks, reflecting site-by-site segmentation typical of a large research agency.
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
7 upstream, 0 downstream and 9 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 11 prefixes · 8.19K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| SG | Singapore | 12 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS23767- Registry name
- A-STAR-AS-AP
- Registrant
- A*STAR
- Abuse contact
- ITSS_Network@hq.a-star.edu.sg
- Registered
- 2008-09-04
- Last changed
- 2023-10-31
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 20% valid · 6 valid, 24 with no ROA
- ROAs
- 7 authorising AS23767
- ASPA
- no ASPA record
- IRR
- 100% registered · 30 of 30 announcements
- Route objects
- 41 naming AS23767
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 1,783 prefixes, as published 2026-10-17. 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