AS23767 — A-STAR-AS-AP - A-STAR

AS23767 announces 11 IPv4 prefixes covering 8,192 addresses and 1 IPv6 prefixes.

About this network

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, and ACRC-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-SG for ASTAR, with some prefixes registered to IRT-ACRC-SG for 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.

Announced prefixes

• 103.37.196.0/22
• 123.136.64.0/24
• 123.136.67.0/24
• 123.136.68.0/22
• 192.122.131.0/24
• 192.122.132.0/22
• 192.122.136.0/22
• 192.122.140.0/24
• 202.6.240.0/22
• 202.83.248.0/22
• 202.130.56.0/22
• 2001:df0:75::/48

Upstream networks

• AS139883 SPTEL PTE. LTD.
• AS23855 Singapore Advanced Research and Education Network
• AS134148 SingAREN
• AS18106 Viewqwest Pte Ltd
• AS149446 Firmus Grid
• AS4637 Telstra Global
• AS132398 Science and Engineering Institutes

Adjacent networks

• AS139883 SPTEL PTE. LTD.
• AS23855 Singapore Advanced Research and Education Network
• AS134148 SingAREN
• AS18106 Viewqwest Pte Ltd
• AS149446 Firmus Grid
• AS4637 Telstra Global
• AS132398 Science and Engineering Institutes

Routing security

• RPKI: 6 valid, 0 invalid and 24 not-found announcements; 7 ROAs.
• ASPA: none published.
• IRR: 97% of announcements registered; 41 route objects.
• Listed in as-sets: AS-ANC-CUSTOMER-PROXY-REGISTER, AS-CAIS6, AS-FEENIX-RADB, AS-HURRICANE, AS-HURRICANEV6, AS-KDDCUSTOMER2, AS-PACNET-DOWNSTREAM-SG, AS-RETN-ACTUAL-V4, AS-RETN-ACTUAL-V6, AS-SH-CUST, AS-SINGAREN-SG, AS-TELSTRA-INTL-CUSTOMERS, AS-TRANSROUTE-SPEC, AS-XO-B, AS134078:AS-CUSTOMERS, AS134148:AS-LOCAL-INSTITUTION, AS134148:AS-RNE, AS134148:AS-RNE-LOCAL-INSTITUTION, AS139883:AS-SPTEL-CUST, AS17645:AS-GLOBAL, AS17645:AS-NTTS-CUST, AS18106:AS-TRANSIT, AS18106:AS-TRANSIT, AS19551:AS-IMPERVA, AS20965:AS-FROM-TEIN-TO-GEANT.