Loading…
How Japan ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to Japan over time.
The largest autonomous systems registered to Japan by IPv4 footprint.
Share of announced address space covered by valid Route Origin Authorizations.
1,297 autonomous systems registered to Japan. Click an AS for detail.
| 669 |
| AS17506JP | UCOM - ARTERIA Networks Corporation | 5.5M | 41 |
| AS2497JP | IIJ - Internet Initiative Japan Inc. | 4M | 206 |
| AS2527JP | So-net - Sony Network Communications Inc. | 3.9M | 76 |
| AS2518JP | BIGLOBE - BIGLOBE Inc. | 3.7M | 35 |
| AS17511JP | OPTAGE - OPTAGE Inc. | 3M | 68 |
| 512 |
| 3 |
| 5 |
| AS142052JP | MEMPOOLSPACEKK-AS-AP - Mempool Space K.K. | 512 | 2 | 4 |
| AS137819JP | BEEKS-AS-AP - Beeks Financial Cloud (Japan) | 512 | — | 2 |
| AS59120JP | TINS-NET - Tsukuba Internet Service Corporation | 512 | — | 1 |
| AS59098JP | Hinaturu-Net - Mamireimu Net Work's | 512 | 4.1K | 3 |
| AS136178JP | FILAPAC-AS-JP - FIL Japan Holdings K.K. | 512 | — | 2 |
| AS146985JP | KC-MSP-NET - KISSEI COMTEC Co.,Ltd | 512 | — | 1 |
| AS151380JP | transformedu - Transform Co., Ltd. | 512 | — | 1 |
| AS131988JP | TANET - Takehara Cable Network Co,Ltd | 512 | 65.5K | 2 |
| AS151383JP | EZSVS-NET - EZSVS Japan Co., Ltd. | 512 | — | 1 |
| AS63785JP | FU-NTP - Fukuoka University | 512 | 3 | 5 |
| AS63806JP | MENHERA - Human-life Information Platforms Institute | 512 | 514 | 6 |
| AS4777JP | APNIC-COLO - Asia Pacific Network Information Centre | 512 | 16.4K | 4 |
| AS945JP | JP-77-20220621 HAONAN YANG | 512 | — | 2 |
| AS38074JP | SDCC-AS-AP - SDCC Japan-West Area | 768 | 32.8K | 5 |
| AS146987JP | GMOCL-NET - GMO GlobalSign Holdings K.K. | 768 | — | 3 |
| AS24283JP | MIEDEN-NET - Mieden Co.,Ltd. | 768 | — | 3 |
| AS153929JP | ABI-AS-AP - Allied Business Inc. | 768 | 256 | 4 |
| AS63776JP | MERCARI-JP - Mercari, Inc. | 768 | 512 | 4 |
| AS152645JP | FLEXTECHINC-AS-AP - Flextech Inc. | 768 | 65.5K | 4 |
| AS37888JP | HORIBA-NET - HORIBA, Ltd. | 768 | — | 3 |
| AS59349JP | GMO-Z-COM - GMO-Z.COM PTE. LTD. | 768 | 1 | 3 |
| AS150369JP | Infal - TelHi Corporation | 768 | 65.5K | 4 |
| AS55911JP | kazukichi - kazukichi | 768 | 66.1K | 8 |
| AS131077JP | TOHMATSU-NET - Deloitte Tohmatsu Group LLC | 768 | — | 3 |
| AS24263JP | HONDA-NET - HONDA MOTOR Co., Ltd. | 768 | — | 3 |
| AS133900JP | GSI-AP - Gilead Sciences, Inc. | 896 | — | 4 |
| AS55894JP | WHOSNEXT - Who's Next | 1K | — | 1 |
| AS136586JP | INCOMMJAPANKK-AS-AP - InComm Japan K.K. | 1K | — | 3 |
| AS4718JP | CKP - Cyber Kansai Project | 1K | 65.5K | 2 |
| AS131940JP | BETANET - Nissho Electronics Corp. | 1K | — | 3 |
| AS131160JP | WI2 - Wire and Wireless Co.,Ltd. | 1K | 65.5K | 2 |
| AS63799JP | GHOST - Ghost Network | 1K | 65.5K | 4 |
| AS55378JP | QUICK-YCCNET - QUICK Corp. | 1K | — | 1 |
| AS131942JP | GURUNAVI-NET - Gurunavi, Inc. | 1K | — | 1 |
| AS55569JP | CRITEO-AS-AP - Criteo APAC | 1K | 8 | 12 |
| AS58645JP | marinet - Miyagi Cable TV Co.,Ltd | 1K | 65.5K | 2 |
| AS131945JP | SNTU-NET - Sanntuu Corporation | 1K | — | 1 |
| AS146981JP | Nekojarashi - Nekojarashi Inc. | 1K | 65.5K | 6 |
| AS59097JP | OCH-NET - Okinawa Cross Head Co., Ltd. | 1K | — | 3 |
| AS55393JP | MIDOKURA - Midokura Japan K.K. | 1K | — | 4 |
| AS131963JP | MCDR-KIX - MC Digital Realty, Inc. | 1K | 65.5K | 2 |
| AS18279JP | BUKKYO-U - Bukkyo University | 1K | — | 1 |
| AS133476JP | FIRST-AS-AP - First Innovation K.K. | 1K | — | 1 |
| AS55891JP | WBTSJP-AS - WATCH TOWER BIBLE AND TRACT SOCIETY | 1K | 133.6K | 13 |
| AS138033JP | BBIX-AS-AP - BBIX, Inc | 1K | 65.5K | 5 |
| AS7660JP | APAN-JP - Asia Pacific Advanced Network - Japan | 1K | 8.4K | 4 |