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Japan (JP)RPKI 59%

Ranked #3 worldwide by IPv4 address space.

IPv4 held

188.7M

11.2 × /8

IPv6 held

670.1M

/48 blocks

AS numbers

278

allocated

World rank

by IPv4

Deep profile

How Japan ranks worldwide on dormant space, the transfer market, routing security and address density.

All rankings →

Dark IPv4

#4 of 242

Allocated but unrouted

Net buyer

+2.6M

Net buyer · #9 of 242

RPKI rank

#27 of 49

By IPv4 ROA coverage

Per-capita rank

#16 of 242

1.53 IPs / person

Interconnection density

PeeringDB-registered presence.

IXPs

113

Facilities

424

Networks

IPv6 adoption

APNIC-measured end-user deployment.

Capable61.0%

Preferred59.1%

Routing hygiene

Clean prefixes (valid RPKI + IRR, no mismatch).

66/100

1,683 clean of 13,339 prefixes

9 RPKI-invalid

Resource history

Cumulative IPv4, IPv6, and ASN allocations to Japan over time.

Top 10 local networks

The largest autonomous systems registered to Japan by IPv4 footprint.

All networks →

AS	Holder	IPv4	Prefixes
AS17676JP	GIGAINFRA - SoftBank Corp.	49.1M	476
AS4713JP	OCN - NTT DOCOMO BUSINESS,Inc.	28.6M	187
AS2516JP	KDDI - KDDI CORPORATION	18.2M	572
AS9824JP	JTCL-JP-AS - JCOM Co., Ltd.	10.3M	293
AS2907JP	SINET-AS - Research Organization of Information and Systems, National Institute of Informatics	9M

Routing security (RPKI)

Share of announced address space covered by valid Route Origin Authorizations.

ipv4RPKI 59%

4,956 valid8 invalid6,962 not found110.3M / 186.3M addrs

ipv6RPKI 85%

715 valid1 invalid697 not found435.4M / 514.9M addrs

Networks in this country

1,300 autonomous systems registered to Japan. Click an AS for detail.

AS	Holder	IPv4 ↑	IPv6 /48	Prefixes
AS2508JP	kyushu-u - Kyushu University	65.5K	—	1
AS37910JP	CUNET - Chubu University	65.5K	—	1
AS18276JP	KAISER - Kansai University	65.5K	—	1
AS17960JP	RAINS-AS - University of the Ryukyus