Japan
APNIC 1,499 Networks 188,689,472 IPv4 addresses
1,499 Networks
188,689,472 IPv4 addresses
785 IPv6 prefixes
APNIC Registry (RIR)
Top networks · by prefix count
| # | Networks | Type | IPv4 prefixes | IPv6 prefixes |
|---|---|---|---|---|
| 1 | AS9009 M247 Europe SRL | ISP | 4,135 | 785 |
| 2 | AS9605 NTT DOCOMO, INC. | ISP | 919 | 326 |
| 3 | AS15830 Equinix (EMEA) Acquisition Enterprises B.V. | ISP | 1,043 | 193 |
| 4 | AS136787 PacketHub S.A. | Unknown | 950 | 3 |
| 5 | AS2907 Research Organization of Information and Systems, National Institute of Informatics | Education | 607 | 2 |
| 6 | AS2516 KDDI CORPORATION | ISP | 564 | 9 |
| 7 | AS17676 SoftBank Corp. | ISP | 463 | 3 |
| 8 | AS979 NetLab Global | ISP | 448 | 0 |
| 9 | AS10013 FreeBit Co.,Ltd. | ISP | 407 | 2 |
| 10 | AS4694 IDC Frontier Inc. | Content | 327 | 5 |
| 11 | AS9824 JCOM Co., Ltd. | ISP | 231 | 62 |
| 12 | AS38631 LY Corporation | Content | 147 | 116 |
| 13 | AS16524 MetTel | ISP | 200 | 28 |
| 14 | AS2497 Internet Initiative Japan Inc. | ISP | 194 | 11 |
| 15 | AS24319 Akamai Technologies Tokyo ASN | Unknown | 153 | 42 |
| 16 | AS10010 TOKAI Communications Corporation | ISP | 187 | 7 |
| 17 | AS13445 Cisco Webex LLC | Content | 131 | 57 |
| 18 | AS48818 NETSER INC | Enterprise | 0 | 187 |
| 19 | AS4713 NTT DOCOMO BUSINESS,Inc. | ISP | 180 | 5 |
| 20 | AS2519 ARTERIA Networks Corporation | ISP | 182 | 2 |
Registry state, monthly snapshots
Data table
| Month | IPv4 addresses | Networks |
|---|---|---|
| 2022-05 | 190272512 | 1157 |
| 2022-06 | 190355456 | 1157 |
| 2022-07 | 190364160 | 1158 |
| 2022-08 | 190365696 | 1155 |
| 2022-09 | 190366464 | 1156 |
| 2022-10 | 190367744 | 1161 |
| 2022-11 | 190371840 | 1177 |
| 2022-12 | 190373888 | 1181 |
| 2023-01 | 190439680 | 1179 |
| 2023-02 | 190503168 | 1182 |
| 2023-03 | 190411264 | 1184 |
| 2023-04 | 190478592 | 1217 |
| 2023-05 | 190609664 | 1230 |
| 2023-06 | 190546176 | 1232 |
| 2023-07 | 190742528 | 1255 |
| 2023-08 | 190726400 | 1258 |
| 2023-09 | 190467840 | 1255 |
| 2023-10 | 190338048 | 1255 |
| 2023-11 | 190337280 | 1256 |
| 2023-12 | 190142720 | 1259 |
| 2024-01 | 190171392 | 1259 |
| 2024-02 | 190102016 | 1257 |
| 2024-03 | 190078976 | 1259 |
| 2024-04 | 189944576 | 1260 |
| 2024-05 | 189808384 | 1262 |
| 2024-06 | 189933568 | 1284 |
| 2024-07 | 189855744 | 1289 |
| 2024-08 | 189826560 | 1291 |
| 2024-09 | 189497856 | 1292 |
| 2024-10 | 189497856 | 1292 |
| 2024-11 | 189497856 | 1291 |
| 2024-12 | 189360384 | 1289 |
| 2025-01 | 189066496 | 1289 |
| 2025-02 | 188699136 | 1292 |
| 2025-03 | 188698880 | 1294 |
| 2025-04 | 188696320 | 1295 |
| 2025-05 | 188692736 | 1297 |
| 2025-06 | 188695808 | 1296 |
| 2025-07 | 188702720 | 1295 |
| 2025-08 | 188695552 | 1294 |
| 2025-09 | 188696128 | 1293 |
| 2025-10 | 188693824 | 1295 |
| 2025-11 | 188679232 | 1295 |
| 2025-12 | 188677952 | 1295 |
| 2026-01 | 188659008 | 1289 |
| 2026-02 | 188722496 | 1285 |
| 2026-03 | 188724800 | 1284 |
| 2026-04 | 188593472 | 1284 |
| 2026-05 | 188595776 | 1287 |
| 2026-06 | 188591680 | 1289 |
Allocation history · Allocation events
- First allocation
- June 1983 1983-06
- Largest allocation month
- March 1997 +18,699,520
- Registry (RIR)
- APNIC
Data table
| Month | IPv4 addresses (cumulative) | ASNs (cumulative) |
|---|---|---|
| 2022-03 | 188626432 | 1134 |
| 2022-05 | 188627456 | 1135 |
| 2022-06 | 188628224 | 1138 |
| 2022-07 | 188629760 | 1140 |
| 2022-08 | 188631296 | 1141 |
| 2022-09 | 188631552 | 1143 |
| 2022-10 | 188631552 | 1158 |
| 2022-11 | 188633600 | 1158 |
| 2022-12 | 188635136 | 1159 |
| 2023-01 | 188636160 | 1160 |
| 2023-03 | 188637184 | 1192 |
| 2023-04 | 188638208 | 1203 |
| 2023-05 | 188640512 | 1204 |
| 2023-06 | 188642816 | 1225 |
| 2023-07 | 188645632 | 1227 |
| 2023-08 | 188648192 | 1227 |
| 2023-09 | 188649984 | 1229 |
| 2023-10 | 188651776 | 1229 |
| 2023-11 | 188652544 | 1230 |
| 2023-12 | 188654080 | 1233 |
| 2024-01 | 188655360 | 1234 |
| 2024-02 | 188656896 | 1235 |
| 2024-03 | 188657664 | 1237 |
| 2024-04 | 188660224 | 1240 |
| 2024-05 | 188661248 | 1260 |
| 2024-06 | 188662272 | 1264 |
| 2024-07 | 188663808 | 1264 |
| 2024-08 | 188664320 | 1267 |
| 2024-09 | 188665344 | 1267 |
| 2024-10 | 188667392 | 1268 |
| 2024-11 | 188668160 | 1269 |
| 2024-12 | 188669440 | 1273 |
| 2025-01 | 188669440 | 1274 |
| 2025-02 | 188670720 | 1276 |
| 2025-03 | 188670720 | 1278 |
| 2025-04 | 188672256 | 1280 |
| 2025-05 | 188673792 | 1281 |
| 2025-06 | 188675072 | 1283 |
| 2025-07 | 188675840 | 1284 |
| 2025-08 | 188675904 | 1284 |
| 2025-09 | 188676160 | 1285 |
| 2025-10 | 188679744 | 1285 |
| 2025-11 | 188679744 | 1285 |
| 2025-12 | 188680768 | 1287 |
| 2026-01 | 188682560 | 1287 |
| 2026-02 | 188683584 | 1289 |
| 2026-03 | 188684864 | 1290 |
| 2026-04 | 188687168 | 1294 |
| 2026-05 | 188689216 | 1296 |
| 2026-06 | 188689472 | 1298 |
Daily snapshot · accumulating since June 2026
Data table
| Day | IPv4 addresses | Networks |
|---|---|---|
| 2026-06-12 | 188689472 | 1494 |
| 2026-06-13 | 188689472 | 1494 |
| 2026-06-14 | 188689472 | 1498 |
| 2026-06-15 | 188689472 | 1498 |
| 2026-06-16 | 188689472 | 1499 |
| 2026-06-17 | 188689472 | 1499 |
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