$ query “AS2497” --type=asn → 1 result(s)
AS2497 — IIJ
Internet Initiative Japan Inc.
AS2497 is a major transit provider registered to Internet Initiative Japan Inc., based in Japan. The network announces an impressive 3.9 million IPv4 addresses, including a /15. Supports IPv6.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- #2 in Japan — Top 10 by reach within country
Basic Information
- Country
- 🇯🇵 Japan
- Category
- Internet Service Provider
- Network Role
- Major Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Last Changed
- March 04, 2026
- Last Seen
- March 04, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 183 / 141
- IPv6 Prefixes (raw / aggregated)
- 8 / 6
- IPv4 Addresses
- 3 908 608
- Largest IPv4 Prefix
- /15 (131 072 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇯🇵 JP (169 IPs), 🇦🇺 AU (6 IPs), 🇺🇸 US (3 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Good — 6 flagged IPs out of 3 908 608 total (0.00%)
- Open Proxies
- 1 known open proxies in this network
Connectivity Summary
- Upstream Providers
- 5 upstream autonomous systems providing transit
- Peers
- 125 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 195 downstream autonomous systems buying transit
- Degree
- 326 unique BGP neighbors (providers + customers + peers)
- Reach
- 33 897 — customer cone size measuring network influence
- Degree Rank
- #398
- Reach Rank
- #366
- Country Rank
- #2
Upstream Providers (5)
Prefix Lists
IPv4 Prefixes (183 total)
- 133.110.0.0/15 (131 072 addresses)
- 172.122.0.0/15 (131 072 addresses)
- 210.148.0.0/15 (131 072 addresses)
- 121.102.0.0/16 (65 536 addresses)
- 125.30.0.0/16 (65 536 addresses)
- 129.249.0.0/16 (65 536 addresses)
- 131.248.0.0/16 (65 536 addresses)
- 132.179.0.0/16 (65 536 addresses)
- 133.127.0.0/16 (65 536 addresses)
- 133.137.0.0/16 (65 536 addresses)
- 133.142.0.0/16 (65 536 addresses)
- 133.159.0.0/16 (65 536 addresses)
- 133.173.0.0/16 (65 536 addresses)
- 133.215.0.0/16 (65 536 addresses)
- 133.218.0.0/16 (65 536 addresses)
- 133.221.0.0/16 (65 536 addresses)
- 133.236.0.0/16 (65 536 addresses)
- 133.245.0.0/16 (65 536 addresses)
- 133.254.0.0/16 (65 536 addresses)
- 134.237.0.0/16 (65 536 addresses)
- 138.107.0.0/16 (65 536 addresses)
- 139.152.0.0/16 (65 536 addresses)
- 143.94.0.0/16 (65 536 addresses)
- 150.23.0.0/16 (65 536 addresses)
- 150.31.0.0/16 (65 536 addresses)
- 150.87.0.0/16 (65 536 addresses)
- 150.90.0.0/16 (65 536 addresses)
- 157.67.0.0/16 (65 536 addresses)
- 160.13.0.0/16 (65 536 addresses)
- 160.17.0.0/16 (65 536 addresses)
- 163.49.0.0/16 (65 536 addresses)
- 163.55.0.0/16 (65 536 addresses)
- 163.140.0.0/16 (65 536 addresses)
- 163.218.0.0/16 (65 536 addresses)
- 167.169.0.0/16 (65 536 addresses)
- 202.32.0.0/16 (65 536 addresses)
- 202.214.0.0/16 (65 536 addresses)
- 202.221.0.0/16 (65 536 addresses)
- 202.232.0.0/16 (65 536 addresses)
- 203.180.0.0/16 (65 536 addresses)
- 210.128.0.0/16 (65 536 addresses)
- 210.130.0.0/16 (65 536 addresses)
- 210.138.0.0/16 (65 536 addresses)
- 219.119.0.0/16 (65 536 addresses)
- 58.138.0.0/17 (32 768 addresses)
- 101.128.128.0/17 (32 768 addresses)
- 113.197.128.0/17 (32 768 addresses)
- 118.151.0.0/17 (32 768 addresses)
- 124.41.0.0/17 (32 768 addresses)
- 133.194.0.0/17 (32 768 addresses)
IPv6 Prefixes (8 total)
- 2001:240::/32
- 2001:300::/32
- 2001:48b0::/32
- 2400:3980::/32
- 240a:71:8000::/35
- 2403:5700::/47