Les adresses IP débutant par 121.3.201 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 | 05/08/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | JP | Japan | - | Tokyo | 35,6895 | 139,6917 | 2017-07-03 |
| MaxMind | JP | Japon | - | Tokyo | 35,6427 | 139,7677 | 2017-07-03 |
| Whois | JP | - | - | - | 138 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.3.201.0 | 2030291200 | 0 |
| 121.3.201.1 | 2030291201 | 0 |
| 121.3.201.2 | 2030291202 | 0 |
| 121.3.201.3 | 2030291203 | 0 |
| 121.3.201.4 | 2030291204 | 0 |
| 121.3.201.5 | 2030291205 | 0 |
| 121.3.201.6 | 2030291206 | 0 |
| 121.3.201.7 | 2030291207 | 0 |
| 121.3.201.8 | 2030291208 | 0 |
| 121.3.201.9 | 2030291209 | 0 |
| 121.3.201.10 | 2030291210 | 0 |
| 121.3.201.11 | 2030291211 | 0 |
| 121.3.201.12 | 2030291212 | 0 |
| 121.3.201.13 | 2030291213 | 0 |
| 121.3.201.14 | 2030291214 | 0 |
| 121.3.201.15 | 2030291215 | 0 |
| 121.3.201.16 | 2030291216 | 0 |
| 121.3.201.17 | 2030291217 | 0 |
| 121.3.201.18 | 2030291218 | 0 |
| 121.3.201.19 | 2030291219 | 0 |
| 121.3.201.20 | 2030291220 | 0 |
| 121.3.201.21 | 2030291221 | 0 |
| 121.3.201.22 | 2030291222 | 0 |
| 121.3.201.23 | 2030291223 | 0 |
| 121.3.201.24 | 2030291224 | 0 |
| 121.3.201.25 | 2030291225 | 0 |
| 121.3.201.26 | 2030291226 | 0 |
| 121.3.201.27 | 2030291227 | 0 |
| 121.3.201.28 | 2030291228 | 0 |
| 121.3.201.29 | 2030291229 | 0 |
| 121.3.201.30 | 2030291230 | 0 |
| 121.3.201.31 | 2030291231 | 0 |
| 121.3.201.32 | 2030291232 | 0 |
| 121.3.201.33 | 2030291233 | 0 |
| 121.3.201.34 | 2030291234 | 0 |
| 121.3.201.35 | 2030291235 | 0 |
| 121.3.201.36 | 2030291236 | 0 |
| 121.3.201.37 | 2030291237 | 0 |
| 121.3.201.38 | 2030291238 | 0 |
| 121.3.201.39 | 2030291239 | 0 |
| 121.3.201.40 | 2030291240 | 0 |
| 121.3.201.41 | 2030291241 | 0 |
| 121.3.201.42 | 2030291242 | 0 |
| 121.3.201.43 | 2030291243 | 0 |
| 121.3.201.44 | 2030291244 | 0 |
| 121.3.201.45 | 2030291245 | 0 |
| 121.3.201.46 | 2030291246 | 0 |
| 121.3.201.47 | 2030291247 | 0 |
| 121.3.201.48 | 2030291248 | 0 |
| 121.3.201.49 | 2030291249 | 0 |
| 121.3.201.50 | 2030291250 | 0 |
| 121.3.201.51 | 2030291251 | 0 |
| 121.3.201.52 | 2030291252 | 0 |
| 121.3.201.53 | 2030291253 | 0 |
| 121.3.201.54 | 2030291254 | 0 |
| 121.3.201.55 | 2030291255 | 0 |
| 121.3.201.56 | 2030291256 | 0 |
| 121.3.201.57 | 2030291257 | 0 |
| 121.3.201.58 | 2030291258 | 0 |
| 121.3.201.59 | 2030291259 | 0 |
| 121.3.201.60 | 2030291260 | 0 |
| 121.3.201.61 | 2030291261 | 0 |
| 121.3.201.62 | 2030291262 | 0 |
| 121.3.201.63 | 2030291263 | 0 |
| 121.3.201.64 | 2030291264 | 0 |
| 121.3.201.65 | 2030291265 | 0 |
| 121.3.201.66 | 2030291266 | 0 |
| 121.3.201.67 | 2030291267 | 0 |
| 121.3.201.68 | 2030291268 | 0 |
| 121.3.201.69 | 2030291269 | 0 |
| 121.3.201.70 | 2030291270 | 0 |
| 121.3.201.71 | 2030291271 | 0 |
| 121.3.201.72 | 2030291272 | 0 |
| 121.3.201.73 | 2030291273 | 0 |
| 121.3.201.74 | 2030291274 | 0 |
| 121.3.201.75 | 2030291275 | 0 |
| 121.3.201.76 | 2030291276 | 0 |
| 121.3.201.77 | 2030291277 | 0 |
| 121.3.201.78 | 2030291278 | 0 |
| 121.3.201.79 | 2030291279 | 0 |
| 121.3.201.80 | 2030291280 | 0 |
| 121.3.201.81 | 2030291281 | 0 |
| 121.3.201.82 | 2030291282 | 0 |
| 121.3.201.83 | 2030291283 | 0 |
| 121.3.201.84 | 2030291284 | 0 |
| 121.3.201.85 | 2030291285 | 0 |