subnet.im

AS23864Singapre Advance Research and Education Network - National Grid Office - IHPC

SingaporeRegistryAPNIC

As of 26th September 2026, AS23864 (Singapre Advance Research and Education…), a network registered in Singapore with APNIC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,122nd-largest of the 79,516 networks we see originating IPv4, and the 351st-largest of 446 in Singapore. It is seen behind 2 upstream networks, most often AS23855 (Singapore Advanced Research and…) and AS11537 (Internet2), and in front of 1 downstream network. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 50% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

1

IPv6 prefixes

1

IPv4 addresses

256

IPv6 /64s

65.5k

Upstream graph

The networks AS23864 is seen behind, one and two hops out, drawn from real AS paths.

AS23864Toward the internet core
Upstream graph for AS23864: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS23864Singapre Advance …This networkAS11537Internet2AS23855Singapore Advance…AS2153CENICAS293ESnetAS136968SingAREN

Networks observed one and two hops upstream of AS23864 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

6

adjacent networks

Upstreams
233%
Peers
350%
Downstreams
117%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS23864
NetworkCountryRelationshipPathsVantage pts
AS23855Singapore Advanced Research and Education NetworkSGPeer8383
AS11537Internet2USPeer431

Prefixes

The largest blocks AS23864 originates, widest first.

Largest prefixes originated by AS23864
PrefixAddressesVisibility
103.5.240.0/2425621/81
2401:c7c0:2::/4865.5k × /6463/64

Routing health

How AS23864's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more50.0%1
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%50.0%1

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS23864 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.