Les adresses IP débutant par 121.3.166 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 | 24/09/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | JP | Japon | - | Hamamatsu | 34,7108 | 137,7261 | 2017-09-23 |
| MaxMind | JP | Japon | - | Hamamatsu | 34,7 | 137,7333 | 2017-09-23 |
| Whois | JP | - | - | - | 138 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.3.166.0 | 2030282240 | 0 |
| 121.3.166.1 | 2030282241 | 0 |
| 121.3.166.2 | 2030282242 | 0 |
| 121.3.166.3 | 2030282243 | 0 |
| 121.3.166.4 | 2030282244 | 0 |
| 121.3.166.5 | 2030282245 | 0 |
| 121.3.166.6 | 2030282246 | 0 |
| 121.3.166.7 | 2030282247 | 0 |
| 121.3.166.8 | 2030282248 | 0 |
| 121.3.166.9 | 2030282249 | 0 |
| 121.3.166.10 | 2030282250 | 0 |
| 121.3.166.11 | 2030282251 | 0 |
| 121.3.166.12 | 2030282252 | 0 |
| 121.3.166.13 | 2030282253 | 0 |
| 121.3.166.14 | 2030282254 | 0 |
| 121.3.166.15 | 2030282255 | 0 |
| 121.3.166.16 | 2030282256 | 0 |
| 121.3.166.17 | 2030282257 | 0 |
| 121.3.166.18 | 2030282258 | 0 |
| 121.3.166.19 | 2030282259 | 0 |
| 121.3.166.20 | 2030282260 | 0 |
| 121.3.166.21 | 2030282261 | 0 |
| 121.3.166.22 | 2030282262 | 0 |
| 121.3.166.23 | 2030282263 | 0 |
| 121.3.166.24 | 2030282264 | 0 |
| 121.3.166.25 | 2030282265 | 0 |
| 121.3.166.26 | 2030282266 | 0 |
| 121.3.166.27 | 2030282267 | 0 |
| 121.3.166.28 | 2030282268 | 0 |
| 121.3.166.29 | 2030282269 | 0 |
| 121.3.166.30 | 2030282270 | 0 |
| 121.3.166.31 | 2030282271 | 0 |
| 121.3.166.32 | 2030282272 | 0 |
| 121.3.166.33 | 2030282273 | 0 |
| 121.3.166.34 | 2030282274 | 0 |
| 121.3.166.35 | 2030282275 | 0 |
| 121.3.166.36 | 2030282276 | 0 |
| 121.3.166.37 | 2030282277 | 0 |
| 121.3.166.38 | 2030282278 | 0 |
| 121.3.166.39 | 2030282279 | 0 |
| 121.3.166.40 | 2030282280 | 0 |
| 121.3.166.41 | 2030282281 | 0 |
| 121.3.166.42 | 2030282282 | 0 |
| 121.3.166.43 | 2030282283 | 0 |
| 121.3.166.44 | 2030282284 | 0 |
| 121.3.166.45 | 2030282285 | 0 |
| 121.3.166.46 | 2030282286 | 0 |
| 121.3.166.47 | 2030282287 | 0 |
| 121.3.166.48 | 2030282288 | 0 |
| 121.3.166.49 | 2030282289 | 0 |
| 121.3.166.50 | 2030282290 | 0 |
| 121.3.166.51 | 2030282291 | 0 |
| 121.3.166.52 | 2030282292 | 0 |
| 121.3.166.53 | 2030282293 | 0 |
| 121.3.166.54 | 2030282294 | 0 |
| 121.3.166.55 | 2030282295 | 0 |
| 121.3.166.56 | 2030282296 | 0 |
| 121.3.166.57 | 2030282297 | 0 |
| 121.3.166.58 | 2030282298 | 0 |
| 121.3.166.59 | 2030282299 | 0 |
| 121.3.166.60 | 2030282300 | 0 |
| 121.3.166.61 | 2030282301 | 0 |
| 121.3.166.62 | 2030282302 | 0 |
| 121.3.166.63 | 2030282303 | 0 |
| 121.3.166.64 | 2030282304 | 0 |
| 121.3.166.65 | 2030282305 | 0 |
| 121.3.166.66 | 2030282306 | 0 |
| 121.3.166.67 | 2030282307 | 0 |
| 121.3.166.68 | 2030282308 | 0 |
| 121.3.166.69 | 2030282309 | 0 |
| 121.3.166.70 | 2030282310 | 0 |
| 121.3.166.71 | 2030282311 | 0 |
| 121.3.166.72 | 2030282312 | 0 |
| 121.3.166.73 | 2030282313 | 0 |
| 121.3.166.74 | 2030282314 | 0 |
| 121.3.166.75 | 2030282315 | 0 |
| 121.3.166.76 | 2030282316 | 0 |
| 121.3.166.77 | 2030282317 | 0 |
| 121.3.166.78 | 2030282318 | 0 |
| 121.3.166.79 | 2030282319 | 0 |
| 121.3.166.80 | 2030282320 | 0 |
| 121.3.166.81 | 2030282321 | 0 |
| 121.3.166.82 | 2030282322 | 0 |
| 121.3.166.83 | 2030282323 | 0 |
| 121.3.166.84 | 2030282324 | 0 |
| 121.3.166.85 | 2030282325 | 0 |