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Japan (JP)RPKI 59%

Ranked #3 worldwide by IPv4 address space.

IPv4 held

188.7M

11.2 × /8

IPv6 held

670.6M

/48 blocks

AS numbers

281

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

114

Facilities

422

Networks

IPv6 adoption

APNIC-measured end-user deployment.

Capable62.9%

Preferred59.6%

Routing hygiene

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

66/100

1,713 clean of 13,539 prefixes

30 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.	49.7M	490
AS4713JP	OCN - NTT DOCOMO BUSINESS,Inc.	28.6M	189
AS2516JP	KDDI - KDDI CORPORATION	18.2M	578
AS9824JP	JTCL-JP-AS - JCOM Co., Ltd.	10.4M	297
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%

5,039 valid29 invalid7,028 not found110.6M / 187.2M addrs

ipv6RPKI 85%

725 valid1 invalid717 not found435.7M / 515.1M addrs

Networks in this country

1,303 autonomous systems registered to Japan. Click an AS for detail.

AS	Holder	IPv4 ↑	IPv6 /48	Prefixes
AS23623JP	CHUO-U - Chuo University	65.5K	—	1
AS45685JP	RIKKYO-U - Rikkyo Gakuin Rikkyo University	65.5K	—	1
AS37910JP	CUNET - Chubu University	65.5K	—	1
AS18128JP	RIKEN - RIKEN