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AS7660Asia Pacific Advanced Network - Japan

JapanRegistryAPNIC

As of 26th September 2026, AS7660 (Asia Pacific Advanced Network - Japan), a network registered in Japan with APNIC, originates 2 IPv4 prefixes covering 1k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 35,802nd-largest of the 79,480 networks we see originating IPv4, and the 536th-largest of 729 in Japan. It is seen behind 11 upstream networks, most often AS23855 (Singapore Advanced Research and…) and AS11537 (Internet2), and in front of 13 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

2

IPv6 prefixes

2

IPv4 addresses

1k

IPv6 /64s

554M

Upstream graph

The networks AS7660 is seen behind, one and two hops out, drawn from real AS paths.

AS7660Toward the internet core
Upstream graph for AS7660: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS7660Asia Pacific Adva…This networkAS2500WIDE ProjectAS2516KDDI CorporationAS2907Science Informati…AS11537Internet2AS23855Singapore Advance…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS2497Internet Initiati…AS6939Hurricane Electri…AS2153CENICAS293ESnetAS136968SingAREN

Networks observed one and two hops upstream of AS7660 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

59

adjacent networks

Upstreams
1119%
Peers
3559%
Downstreams
1322%

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

Upstreams of AS7660
NetworkCountryRelationshipPathsVantage pts
AS23855Singapore Advanced Research and Education NetworkSGPeer1,2502
AS11537Internet2USPeer7781
AS2516KDDI CorporationJPPeer18492
AS2907Science Information NetworkJPPeer6432
AS2500WIDE ProjectJPPeer147
AS6939Hurricane Electric LLCUSPeer105
AS24287National Institute of InformaticsJPPeer51
AS49544i3D.net B.VNLPeer42
AS35280F5 Networks SARLFRPeer42
AS23815Japan Internet Xing Co., Ltd.JPPeer21

Prefixes

The largest blocks AS7660 originates, widest first.

Largest prefixes originated by AS7660
PrefixAddressesVisibility
203.181.194.0/2351280/81
203.181.248.0/2351280/81
2001:200:e000::/35537M × /6463/64
2001:200:900::/4016.8M × /6463/64

Routing health

How AS7660'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%4
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 2 prefixes

  • /35537M × /6450.0%1
  • /4016.8M × /6450.0%1

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS7660 started or stopped in this period.

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