AS9419 — NTU-AS-AP Nanyang Technological University

Network type: education

AS9419 announces 7 IPv4 prefixes covering 60,928 addresses and 1 IPv6 prefixes.

About this network

AS9419 (NTU-AS-AP) is held by Nanyang Technological University, one of Singapore's two large public research universities. It is the campus autonomous system: a single university carrying its own students, staff, halls of residence and research computing, rather than a service provider selling connectivity to anyone else.

What it's used for

The routing evidence is textbook campus network. The AS originates 4 IPv4 prefixes covering 65,536 addresses, and all of them fall inside 155.69.0.0/16 — a single legacy /16 from the era when a university could still be handed a classful block, announced as a whole plus a few more-specific covering routes (155.69.64.0/19, 155.69.96.0/23, 155.69.1.0/24) that are almost certainly there to steer traffic across more than one upstream. No IPv6 prefixes were seen in the RIS view. Against that 65k of address space the AS is observed with only about 11 BGP neighbours, which is the decisive signal: a wholesale or transit carrier of any size peers with hundreds of networks, while an institution that only needs to reach the internet for its own users buys from a couple of providers and peers at the local exchange. Everything here says single-site consumer of transit, not seller of it.

Notable

• The whole footprint is one /16, 155.69.0.0/16 — a legacy university allocation, which is why the address count is high relative to how few prefixes and neighbours the AS actually has.
• The low neighbour count rules out any transit or hosting role; this space serves NTU's own campus.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 155.69.0.0/18
• 155.69.80.0/20
• 155.69.98.0/23
• 155.69.100.0/22
• 155.69.104.0/21
• 155.69.112.0/20
• 155.69.128.0/17
• 2407:9380:1::/48

Upstream networks

• AS23855 Singapore Advanced Research and Education Network
• AS4657 StarHub Ltd
• AS3758 SingNet
• AS6939 Hurricane Electric LLC
• AS134148 SingAREN
• AS24482 SG.GS
• AS57463 NetIX Communications JSC
• AS38001 NewMedia Express Pte Ltd

Adjacent networks

• AS23855 Singapore Advanced Research and Education Network
• AS4657 StarHub Ltd
• AS3758 SingNet
• AS6939 Hurricane Electric LLC
• AS134148 SingAREN
• AS38001 NewMedia Express Pte Ltd
• AS24482 SG.GS
• AS57463 NetIX Communications JSC

Internet exchanges

• Singapore Internet Exchange — Singapore, Singapore