Les adresses IP débutant par 121.2.153 sont fournies par So-net Entertainment Corporation, elles appartiennent au CIDR (Classless Inter-Domain Routing) 121.2.0.0/15, le bloc IP comprant les adresses de 121.2.0.0 à 121.3.255.255). Le numéro de système autonome (ASN) est 2527.
| ASN | 2527 |
| IP commençant par | 121.2.0.0 |
| IP se terminant par | 121.3.255.255 |
| Nom ASN | So-net Entertainment Corporation |
| CDIR | 121.2.0.0/15 |
| IP numérique | |
| Registe | apnic |
| Dernière mise à jour | 24/07/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | JP | Japon | - | Saitama | 35,867 | 139,65 | 2017-07-24 |
| MaxMind | JP | Japon | - | Tokyo | 35,6427 | 139,7677 | 2017-07-24 |
| Whois | JP | - | - | - | 138 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.2.153.0 | 2030213376 | 0 |
| 121.2.153.1 | 2030213377 | 0 |
| 121.2.153.2 | 2030213378 | 0 |
| 121.2.153.3 | 2030213379 | 0 |
| 121.2.153.4 | 2030213380 | 0 |
| 121.2.153.5 | 2030213381 | 0 |
| 121.2.153.6 | 2030213382 | 0 |
| 121.2.153.7 | 2030213383 | 0 |
| 121.2.153.8 | 2030213384 | 0 |
| 121.2.153.9 | 2030213385 | 0 |
| 121.2.153.10 | 2030213386 | 0 |
| 121.2.153.11 | 2030213387 | 0 |
| 121.2.153.12 | 2030213388 | 0 |
| 121.2.153.13 | 2030213389 | 0 |
| 121.2.153.14 | 2030213390 | 0 |
| 121.2.153.15 | 2030213391 | 0 |
| 121.2.153.16 | 2030213392 | 0 |
| 121.2.153.17 | 2030213393 | 0 |
| 121.2.153.18 | 2030213394 | 0 |
| 121.2.153.19 | 2030213395 | 0 |
| 121.2.153.20 | 2030213396 | 0 |
| 121.2.153.21 | 2030213397 | 0 |
| 121.2.153.22 | 2030213398 | 0 |
| 121.2.153.23 | 2030213399 | 0 |
| 121.2.153.24 | 2030213400 | 0 |
| 121.2.153.25 | 2030213401 | 0 |
| 121.2.153.26 | 2030213402 | 0 |
| 121.2.153.27 | 2030213403 | 0 |
| 121.2.153.28 | 2030213404 | 0 |
| 121.2.153.29 | 2030213405 | 0 |
| 121.2.153.30 | 2030213406 | 0 |
| 121.2.153.31 | 2030213407 | 0 |
| 121.2.153.32 | 2030213408 | 0 |
| 121.2.153.33 | 2030213409 | 0 |
| 121.2.153.34 | 2030213410 | 0 |
| 121.2.153.35 | 2030213411 | 0 |
| 121.2.153.36 | 2030213412 | 0 |
| 121.2.153.37 | 2030213413 | 0 |
| 121.2.153.38 | 2030213414 | 0 |
| 121.2.153.39 | 2030213415 | 0 |
| 121.2.153.40 | 2030213416 | 0 |
| 121.2.153.41 | 2030213417 | 0 |
| 121.2.153.42 | 2030213418 | 0 |
| 121.2.153.43 | 2030213419 | 0 |
| 121.2.153.44 | 2030213420 | 0 |
| 121.2.153.45 | 2030213421 | 0 |
| 121.2.153.46 | 2030213422 | 0 |
| 121.2.153.47 | 2030213423 | 0 |
| 121.2.153.48 | 2030213424 | 0 |
| 121.2.153.49 | 2030213425 | 0 |
| 121.2.153.50 | 2030213426 | 0 |
| 121.2.153.51 | 2030213427 | 0 |
| 121.2.153.52 | 2030213428 | 0 |
| 121.2.153.53 | 2030213429 | 0 |
| 121.2.153.54 | 2030213430 | 0 |
| 121.2.153.55 | 2030213431 | 0 |
| 121.2.153.56 | 2030213432 | 0 |
| 121.2.153.57 | 2030213433 | 0 |
| 121.2.153.58 | 2030213434 | 0 |
| 121.2.153.59 | 2030213435 | 0 |
| 121.2.153.60 | 2030213436 | 0 |
| 121.2.153.61 | 2030213437 | 0 |
| 121.2.153.62 | 2030213438 | 0 |
| 121.2.153.63 | 2030213439 | 0 |
| 121.2.153.64 | 2030213440 | 0 |
| 121.2.153.65 | 2030213441 | 0 |
| 121.2.153.66 | 2030213442 | 0 |
| 121.2.153.67 | 2030213443 | 0 |
| 121.2.153.68 | 2030213444 | 0 |
| 121.2.153.69 | 2030213445 | 0 |
| 121.2.153.70 | 2030213446 | 0 |
| 121.2.153.71 | 2030213447 | 0 |
| 121.2.153.72 | 2030213448 | 0 |
| 121.2.153.73 | 2030213449 | 0 |
| 121.2.153.74 | 2030213450 | 0 |
| 121.2.153.75 | 2030213451 | 0 |
| 121.2.153.76 | 2030213452 | 0 |
| 121.2.153.77 | 2030213453 | 0 |
| 121.2.153.78 | 2030213454 | 0 |
| 121.2.153.79 | 2030213455 | 0 |
| 121.2.153.80 | 2030213456 | 0 |
| 121.2.153.81 | 2030213457 | 0 |
| 121.2.153.82 | 2030213458 | 0 |
| 121.2.153.83 | 2030213459 | 0 |
| 121.2.153.84 | 2030213460 | 0 |
| 121.2.153.85 | 2030213461 | 0 |