AS2497 Internet Initiative Japan Inc.

AS2497Internet Initiative Japan Inc.ISP

WHOIS Topology

Japan · APNICiij.ad.jp

Hosts top sitesAnycastHome broadbandCritical infrastructureRPKI filtering

IPv4 addresses

4,097,024

258 announced prefixes

IPv6 addresses

3.26 × 10²⁹

11 announced prefixes

BGP neighbours

…

CAIDA rank

#87

Customer cone 703 ASNs

Estimated users

618K

APNIC: 617K

RPKI

60% valid

0 invalid · 107 not covered

Average purity

1,547 sampled IPs

IXPs / facilities

15 / 17

Operator self-reported

History

How prefixes were announced and changed hands, registration changes, and outage or hijack incidents.

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IP ranges

Currently announced prefixes with their RIR registration and geolocation.

Prefix	RPKI	Registration	Geolocation	Addresses
172.122.0.0/15	Valid	IIJAPNIC	Mejiro	131,072
81.203.0.0/16	Valid	IIJAPNIC	Japan	65,536
121.102.0.0/16	Valid	IIJAPNIC	Kyoto	65,536
125.30.0.0/16	Valid	IIJAPNIC	Yokohama	65,536
129.249.0.0/16	Not found	FFBI-NETAPNIC	Japan	65,536
131.248.0.0/16	Not found	CTC-NETAPNIC	Japan	65,536
132.179.0.0/16	Not found	TPMA-NETAPNIC	Japan	65,536
133.110.0.0/16	Valid	JPNIC-NET-JP-ERXAPNIC	Yukuhashi	65,536
133.111.0.0/16	Not found	JPNIC-NET-JP-ERXAPNIC	Japan	65,536
133.127.0.0/16	Not found	JPNIC-NET-JP-ERXAPNIC	Matsubara	65,536
133.137.0.0/16	Valid	JPNIC-NET-JP-ERXAPNIC	Japan	65,536
133.142.0.0/16	Valid	JPNIC-NET-JP-ERXAPNIC	Japan	65,536
133.159.0.0/16	Valid	JPNIC-NET-JP-ERXAPNIC	Kawagoe	65,536
133.173.0.0/16	Not found	JPNIC-NET-JP-ERXAPNIC	Japan	65,536
133.215.0.0/16	Not found	JPNIC-NET-JP-ERXAPNIC	Japan	65,536
133.218.0.0/16	Valid	JPNIC-NET-JP-ERXAPNIC	Isesaki	65,536
133.221.0.0/16	Not found	JPNIC-NET-JP-ERXAPNIC	Tokyo	65,536
133.236.0.0/16	Valid	JPNIC-NET-JP-ERXAPNIC	Japan	65,536
133.245.0.0/16	Not found	JPNIC-NET-JP-ERXAPNIC	Japan	65,536
133.254.0.0/16	Not found	JPNIC-NET-JP-ERXAPNIC	Shizuoka	65,536

/24 block profile

One square per /24: colour shows the risk type, shade how many addresses are flagged, stripes mark datacenter blocks. Click a square to see all 256 addresses.

/24s with data 242 / 16,004 （2%） · flagged 67

No risk flagsDatacenter (no flags)ProxyVPNAbuse / blocklistTorDarker = more flagged addresses; dashed = block screen only

220.100.0.0/1721/128 with data · 6 flagged

133.157.32.0/1915/32 with data · 0 flagged

58.138.0.0/1713/128 with data · 1 flagged

61.124.0.0/2013/16 with data · 2 flagged

133.218.0.0/1611/256 with data · 7 flagged

61.124.16.0/2011/16 with data · 2 flagged

133.159.0.0/169/256 with data · 1 flagged

150.31.0.0/169/256 with data · 3 flagged

125.30.0.0/168/256 with data · 2 flagged

210.130.0.0/168/256 with data · 0 flagged

220.210.128.0/188/64 with data · 2 flagged

160.13.0.0/167/256 with data · 4 flagged

Hover a square for its numbers; click to see all 256 addresses.

Each prefix shows its 64 /24s with the most data. Built daily from lookups, neighbour sampling, public lists and block screening.

IP reputation

IPs from this network that CleanIP has analysed: purity, abuse reports and the riskiest /24 blocks.

Purity distribution

85–100 1,01770–84 51750–69 130–49 0

0.01%

Share of IPv4 reported or blocklisted

466

Listed IPs

1,547

Analysed IPs

Riskiest /24 blocks

/24 block	Flagged	Analysed
14.137.235.0/24	3	27
133.218.57.0/24	2	2
202.214.238.0/24	1	8
104.165.254.0/24	1	6
125.30.6.0/24	1	2
45.38.103.0/24	1	2
125.30.169.0/24	1	1
133.218.193.0/24	1	1
133.218.25.0/24	1	1
150.31.13.0/24	1	1

Flagged = VPN, proxy, Tor or purity below 50. Samples come from user lookups and neighbour sampling, not every address in this network.

Geography

Where this network’s IPv4 addresses are located.

Japan99.7%
United States0.3%
Bulgaria0.0%

Scope: Single country
In registered country: 99.7%

Estimated by sampling IPv4 ranges against a geolocation database.

Traffic observation

AS2497 · Last 7 days

Mobile vs. Desktop

Desktop59.7%Mobile40.3%

Bot vs. Human

Human78.3%Bot21.7%

Adoption & Usage

Adoption and usage of key protocols

Internet Protocol (IP) Version

IPv486.8%IPv613.2%

HTTP Version

HTTP/1.x

21.9%HTTP/2

64.7%HTTP/3

13.4%

HTTP vs. HTTPS

99.2% HTTPS (encrypted)

Plain HTTP 0.8%

TLS Version

TLS 1.0/1.1< 0.1%TLS 1.24.5%TLS 1.382.0%QUIC13.5%

Security & Attacks

Insights into network and application layer attack traffic

Layer 7 Attacks

GET

87.7%POST

11.2%HEAD

0.9%OPTIONS

0.2%

BGP Announcements

Hourly BGP route announcements over the last 7 days

1,033,556

7-day total

47,574

Hourly peak

Data: Cloudflare Radar, licensed under CC BY-NC 4.0

Activity

Hourly traffic over the last 7 days, normalized to this network’s peak.

A pronounced day/night rhythm, typical of networks with human users.

	00						06						12						18
Mon
Tue
Wed
Thu
Fri
Sat
Sun

Times in UTCLessMore

Peak hour: 03:00–04:00
Active hours: 13 hrs
Weekend vs weekday: Weekdays heavier
Busiest day: Mon

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BGP upstreams and neighbours

AS2497Standalone page

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WHOIS record

The registry’s record for this AS number: holder, status, dates and contacts.

Sources

Where the information on this page comes from and when it was updated.

Information	Source	Updated
Registered country	RIR daily delegation statistics	2026-10-20
Organization & company country	AS-to-organization data	2026-10-21
Network type	CleanIP ASN canon	2026-10-21
Exchanges & facilities	Operator self-reported interconnection data	2026-10-21
Announced prefixes & BGP neighbours	Public BGP routing data	2026-10-22
IPv4 geography	Geolocation database	—
RPKI validation	RPKI ROA validation data	2026-10-22
Rank & customer cone	CAIDA AS Rank	2026-10-01
Estimated users (APNIC)	APNIC Labs user estimates	2026-10-19
Network tags	Public routing data community tags	2026-10-21
IP reputation	CleanIP lookups and neighbour sampling	—

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Multi-source cross-checks · In-house reputation data · Real data only