The IP address 21.81.52 is provided by China Education and Research Network Center, it's belong to the CDIR (Classless Inter-Domain Routing) 22.30.204.0/23 (range 22.30.204.0 to 22.30.205.255). The autonomous system number (ASN) is 4538.
| ASN | 4538 |
| IP starting by | 22.30.204.0 |
| IP ending by | 22.30.205.255 |
| ASN Name | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| Numerical IP | |
| Registry | |
| Last update | 02/09/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2017-09-02 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2017-09-02 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.81.52.0 | 357643264 | 0 |
| 21.81.52.1 | 357643265 | 0 |
| 21.81.52.2 | 357643266 | 0 |
| 21.81.52.3 | 357643267 | 0 |
| 21.81.52.4 | 357643268 | 0 |
| 21.81.52.5 | 357643269 | 0 |
| 21.81.52.6 | 357643270 | 0 |
| 21.81.52.7 | 357643271 | 0 |
| 21.81.52.8 | 357643272 | 0 |
| 21.81.52.9 | 357643273 | 0 |
| 21.81.52.10 | 357643274 | 0 |
| 21.81.52.11 | 357643275 | 0 |
| 21.81.52.12 | 357643276 | 0 |
| 21.81.52.13 | 357643277 | 0 |
| 21.81.52.14 | 357643278 | 0 |
| 21.81.52.15 | 357643279 | 0 |
| 21.81.52.16 | 357643280 | 0 |
| 21.81.52.17 | 357643281 | 0 |
| 21.81.52.18 | 357643282 | 0 |
| 21.81.52.19 | 357643283 | 0 |
| 21.81.52.20 | 357643284 | 0 |
| 21.81.52.21 | 357643285 | 0 |
| 21.81.52.22 | 357643286 | 0 |
| 21.81.52.23 | 357643287 | 0 |
| 21.81.52.24 | 357643288 | 0 |
| 21.81.52.25 | 357643289 | 0 |
| 21.81.52.26 | 357643290 | 0 |
| 21.81.52.27 | 357643291 | 0 |
| 21.81.52.28 | 357643292 | 0 |
| 21.81.52.29 | 357643293 | 0 |
| 21.81.52.30 | 357643294 | 0 |
| 21.81.52.31 | 357643295 | 0 |
| 21.81.52.32 | 357643296 | 0 |
| 21.81.52.33 | 357643297 | 0 |
| 21.81.52.34 | 357643298 | 0 |
| 21.81.52.35 | 357643299 | 0 |
| 21.81.52.36 | 357643300 | 0 |
| 21.81.52.37 | 357643301 | 0 |
| 21.81.52.38 | 357643302 | 0 |
| 21.81.52.39 | 357643303 | 0 |
| 21.81.52.40 | 357643304 | 0 |
| 21.81.52.41 | 357643305 | 0 |
| 21.81.52.42 | 357643306 | 0 |
| 21.81.52.43 | 357643307 | 0 |
| 21.81.52.44 | 357643308 | 0 |
| 21.81.52.45 | 357643309 | 0 |
| 21.81.52.46 | 357643310 | 0 |
| 21.81.52.47 | 357643311 | 0 |
| 21.81.52.48 | 357643312 | 0 |
| 21.81.52.49 | 357643313 | 0 |
| 21.81.52.50 | 357643314 | 0 |
| 21.81.52.51 | 357643315 | 0 |
| 21.81.52.52 | 357643316 | 0 |
| 21.81.52.53 | 357643317 | 0 |
| 21.81.52.54 | 357643318 | 0 |
| 21.81.52.55 | 357643319 | 0 |
| 21.81.52.56 | 357643320 | 0 |
| 21.81.52.57 | 357643321 | 0 |
| 21.81.52.58 | 357643322 | 0 |
| 21.81.52.59 | 357643323 | 0 |
| 21.81.52.60 | 357643324 | 0 |
| 21.81.52.61 | 357643325 | 0 |
| 21.81.52.62 | 357643326 | 0 |
| 21.81.52.63 | 357643327 | 0 |
| 21.81.52.64 | 357643328 | 0 |
| 21.81.52.65 | 357643329 | 0 |
| 21.81.52.66 | 357643330 | 0 |
| 21.81.52.67 | 357643331 | 0 |
| 21.81.52.68 | 357643332 | 0 |
| 21.81.52.69 | 357643333 | 0 |
| 21.81.52.70 | 357643334 | 0 |
| 21.81.52.71 | 357643335 | 0 |
| 21.81.52.72 | 357643336 | 0 |
| 21.81.52.73 | 357643337 | 0 |
| 21.81.52.74 | 357643338 | 0 |
| 21.81.52.75 | 357643339 | 0 |
| 21.81.52.76 | 357643340 | 0 |
| 21.81.52.77 | 357643341 | 0 |
| 21.81.52.78 | 357643342 | 0 |
| 21.81.52.79 | 357643343 | 0 |
| 21.81.52.80 | 357643344 | 0 |
| 21.81.52.81 | 357643345 | 0 |
| 21.81.52.82 | 357643346 | 0 |
| 21.81.52.83 | 357643347 | 0 |
| 21.81.52.84 | 357643348 | 0 |
| 21.81.52.85 | 357643349 | 0 |