Autonomous system
AS7660 APAN-JP Asia Pacific Advanced Network - Japan
Unclassified APNIC
Summary
APAN-JP (Asia Pacific Advanced Network, Japan)
education research legacy
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 in2001:200:900::/40and2001:200: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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| JPIX Tokyo | Tokyo, Japan | 210.171.225.166 |
| Network Service Provider IXP (Distributed IX in Edo) | Tokyo, Japan | 202.249.2.160 |
Transit providers
6 upstream, 17 downstream and 38 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 1.02K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 4 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS7660- Registry name
- APAN-JP
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 1997-11-13
- Last changed
- 2009-09-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 4 authorising AS7660
- ASPA
- no ASPA record
- IRR
- 50% registered · 2 of 4 announcements
- Route objects
- 2 naming AS7660
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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