L'indirizzo IP 21.81.83 è fornito da China Education and Research Network Center, che è di proprietà del CIDR (Classless Inter-Domain Routing) 22.30.204.0/23, IP tra 22.30.204.0 a 22.30.205.255 ). Il numero di sistema autonomo (ASN) è 4538.
| ASN | 4538 |
| IP inizia con | 22.30.204.0 |
| IP finale con | 22.30.205.255 |
| ASN Nome | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| IP numerico | |
| Registe | |
| Ultimo aggiornamento | 14/09/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Houston | 29,7633 | -95,3633 | 2018-08-14 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2018-08-14 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.81.83.0 | 357651200 | 0 |
| 21.81.83.1 | 357651201 | 0 |
| 21.81.83.2 | 357651202 | 0 |
| 21.81.83.3 | 357651203 | 0 |
| 21.81.83.4 | 357651204 | 0 |
| 21.81.83.5 | 357651205 | 0 |
| 21.81.83.6 | 357651206 | 0 |
| 21.81.83.7 | 357651207 | 0 |
| 21.81.83.8 | 357651208 | 0 |
| 21.81.83.9 | 357651209 | 0 |
| 21.81.83.10 | 357651210 | 0 |
| 21.81.83.11 | 357651211 | 0 |
| 21.81.83.12 | 357651212 | 0 |
| 21.81.83.13 | 357651213 | 0 |
| 21.81.83.14 | 357651214 | 0 |
| 21.81.83.15 | 357651215 | 0 |
| 21.81.83.16 | 357651216 | 0 |
| 21.81.83.17 | 357651217 | 0 |
| 21.81.83.18 | 357651218 | 0 |
| 21.81.83.19 | 357651219 | 0 |
| 21.81.83.20 | 357651220 | 0 |
| 21.81.83.21 | 357651221 | 0 |
| 21.81.83.22 | 357651222 | 0 |
| 21.81.83.23 | 357651223 | 0 |
| 21.81.83.24 | 357651224 | 0 |
| 21.81.83.25 | 357651225 | 0 |
| 21.81.83.26 | 357651226 | 0 |
| 21.81.83.27 | 357651227 | 0 |
| 21.81.83.28 | 357651228 | 0 |
| 21.81.83.29 | 357651229 | 0 |
| 21.81.83.30 | 357651230 | 0 |
| 21.81.83.31 | 357651231 | 0 |
| 21.81.83.32 | 357651232 | 0 |
| 21.81.83.33 | 357651233 | 0 |
| 21.81.83.34 | 357651234 | 0 |
| 21.81.83.35 | 357651235 | 0 |
| 21.81.83.36 | 357651236 | 0 |
| 21.81.83.37 | 357651237 | 0 |
| 21.81.83.38 | 357651238 | 0 |
| 21.81.83.39 | 357651239 | 0 |
| 21.81.83.40 | 357651240 | 0 |
| 21.81.83.41 | 357651241 | 0 |
| 21.81.83.42 | 357651242 | 0 |
| 21.81.83.43 | 357651243 | 0 |
| 21.81.83.44 | 357651244 | 0 |
| 21.81.83.45 | 357651245 | 0 |
| 21.81.83.46 | 357651246 | 0 |
| 21.81.83.47 | 357651247 | 0 |
| 21.81.83.48 | 357651248 | 0 |
| 21.81.83.49 | 357651249 | 0 |
| 21.81.83.50 | 357651250 | 0 |
| 21.81.83.51 | 357651251 | 0 |
| 21.81.83.52 | 357651252 | 0 |
| 21.81.83.53 | 357651253 | 0 |
| 21.81.83.54 | 357651254 | 0 |
| 21.81.83.55 | 357651255 | 0 |
| 21.81.83.56 | 357651256 | 0 |
| 21.81.83.57 | 357651257 | 0 |
| 21.81.83.58 | 357651258 | 0 |
| 21.81.83.59 | 357651259 | 0 |
| 21.81.83.60 | 357651260 | 0 |
| 21.81.83.61 | 357651261 | 0 |
| 21.81.83.62 | 357651262 | 0 |
| 21.81.83.63 | 357651263 | 0 |
| 21.81.83.64 | 357651264 | 0 |
| 21.81.83.65 | 357651265 | 0 |
| 21.81.83.66 | 357651266 | 0 |
| 21.81.83.67 | 357651267 | 0 |
| 21.81.83.68 | 357651268 | 0 |
| 21.81.83.69 | 357651269 | 0 |
| 21.81.83.70 | 357651270 | 0 |
| 21.81.83.71 | 357651271 | 0 |
| 21.81.83.72 | 357651272 | 0 |
| 21.81.83.73 | 357651273 | 0 |
| 21.81.83.74 | 357651274 | 0 |
| 21.81.83.75 | 357651275 | 0 |
| 21.81.83.76 | 357651276 | 0 |
| 21.81.83.77 | 357651277 | 0 |
| 21.81.83.78 | 357651278 | 0 |
| 21.81.83.79 | 357651279 | 0 |
| 21.81.83.80 | 357651280 | 0 |
| 21.81.83.81 | 357651281 | 0 |
| 21.81.83.82 | 357651282 | 0 |
| 21.81.83.83 | 357651283 | 0 |
| 21.81.83.84 | 357651284 | 0 |
| 21.81.83.85 | 357651285 | 0 |