AS7660 — APAN-JP Asia Pacific Advanced Network - Japan

AS7660 announces 2 IPv4 prefixes covering 1,024 addresses and 2 IPv6 prefixes.

About this network

APAN-JP is the Japanese arm of the Asia Pacific Advanced Network, the regional consortium of research and education networks. APAN-JP is the largest national contingent in APAN, and AS7660 is its network, registered from a KDDI building in Otemachi, Tokyo.

What it's used for

• Research and education networking. The AS is small and deliberately so: two IPv4 /23s out of JPNIC space for about 1,000 addresses, alongside a much larger IPv6 inventory in 2001:200:900::/40 and 2001:200:e000::/35.
• Its upstreams are exactly the ones you would expect of an R&E network and nothing else: KDDI, SINET (Japan's National Institute of Informatics science network) and the WIDE Project.
• Reverse DNS is research infrastructure. Hosts resolve under jp.apan.net, including PlanetLab measurement nodes.

Notable

• This is research address space. No subscribers, no commercial hosting, no enterprise. Traffic from AS7660 is far more likely to be a measurement node, an experimental service or an inter-NREN link than an ordinary user.
• The IPv6 footprint dwarfs the IPv4 one, which is characteristic of the Japanese research community: APAN and WIDE were doing production IPv6 long before commercial networks touched it.

Interesting

• APAN is a consortium rather than a carrier, so this AS exists mainly to give the Japanese chapter its own presence for interconnection and experimentation. The address space is the point of contact, not the product.

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

Announced prefixes

• 203.181.194.0/23
• 203.181.248.0/23
• 2001:200:900::/40
• 2001:200:e000::/35

Upstream networks

• AS2516 KDDI CORPORATION
• AS6939 Hurricane Electric LLC
• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS11537 Internet2
• AS2500 WIDE Project
• AS24482 SG.GS

Downstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
• AS9270 National Infomation Society Agency
• AS17579 KISTI
• AS11537 Internet2
• AS4538 China Education and Research Network Center
• AS2500 WIDE Project
• AS24475 ThaiREN.Thailand Research and Education Network Thailand
• AS9821 Department of Science and Technology
• AS23911 China Next Generation Internet Beijing IX
• AS9264 Academia Sinica
• AS23855 Singapore Advanced Research and Education Network
• AS24287 National Institute of Informatics
• AS18125 Tsukuba Business-Academia Cooperation Support Center, Agriculture, Forestry and Fisheries Research Council Secretariat, Ministry of Agriculture, Forestry and Fisheries
• AS9355 National Institute of Information and Communications Technology
• AS137207 Joint Universities Computer Centre Limited
• AS9367 Institute of Science Tokyo

Adjacent networks

• AS11537 Internet2
• AS23855 Singapore Advanced Research and Education Network
• AS24475 ThaiREN.Thailand Research and Education Network Thailand
• AS24490 Trans-Eurasia Information Network (TEIN2) - SG
• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS23911 China Next Generation Internet Beijing IX
• AS9264 Academia Sinica
• AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
• AS24287 National Institute of Informatics
• AS17579 KISTI
• AS9270 National Infomation Society Agency
• AS9821 Department of Science and Technology
• AS2500 WIDE Project
• AS2516 KDDI CORPORATION
• AS137207 Joint Universities Computer Centre Limited
• AS6939 Hurricane Electric LLC
• AS4538 China Education and Research Network Center
• AS18125 Tsukuba Business-Academia Cooperation Support Center, Agriculture, Forestry and Fisheries Research Council Secretariat, Ministry of Agriculture, Forestry and Fisheries
• AS24482 SG.GS
• AS9367 Institute of Science Tokyo
• AS9355 National Institute of Information and Communications Technology

Internet exchanges

• JPIX Tokyo — Tokyo, Japan
• Network Service Provider IXP (Distributed IX in Edo) — Tokyo, Japan