The IP address 21.72.20 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 | 08/07/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2017-07-08 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2017-07-08 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.72.20.0 | 357045248 | 0 |
| 21.72.20.1 | 357045249 | 0 |
| 21.72.20.2 | 357045250 | 0 |
| 21.72.20.3 | 357045251 | 0 |
| 21.72.20.4 | 357045252 | 0 |
| 21.72.20.5 | 357045253 | 0 |
| 21.72.20.6 | 357045254 | 0 |
| 21.72.20.7 | 357045255 | 0 |
| 21.72.20.8 | 357045256 | 0 |
| 21.72.20.9 | 357045257 | 0 |
| 21.72.20.10 | 357045258 | 0 |
| 21.72.20.11 | 357045259 | 0 |
| 21.72.20.12 | 357045260 | 0 |
| 21.72.20.13 | 357045261 | 0 |
| 21.72.20.14 | 357045262 | 0 |
| 21.72.20.15 | 357045263 | 0 |
| 21.72.20.16 | 357045264 | 0 |
| 21.72.20.17 | 357045265 | 0 |
| 21.72.20.18 | 357045266 | 0 |
| 21.72.20.19 | 357045267 | 0 |
| 21.72.20.20 | 357045268 | 0 |
| 21.72.20.21 | 357045269 | 0 |
| 21.72.20.22 | 357045270 | 0 |
| 21.72.20.23 | 357045271 | 0 |
| 21.72.20.24 | 357045272 | 0 |
| 21.72.20.25 | 357045273 | 0 |
| 21.72.20.26 | 357045274 | 0 |
| 21.72.20.27 | 357045275 | 0 |
| 21.72.20.28 | 357045276 | 0 |
| 21.72.20.29 | 357045277 | 0 |
| 21.72.20.30 | 357045278 | 0 |
| 21.72.20.31 | 357045279 | 0 |
| 21.72.20.32 | 357045280 | 0 |
| 21.72.20.33 | 357045281 | 0 |
| 21.72.20.34 | 357045282 | 0 |
| 21.72.20.35 | 357045283 | 0 |
| 21.72.20.36 | 357045284 | 0 |
| 21.72.20.37 | 357045285 | 0 |
| 21.72.20.38 | 357045286 | 0 |
| 21.72.20.39 | 357045287 | 0 |
| 21.72.20.40 | 357045288 | 0 |
| 21.72.20.41 | 357045289 | 0 |
| 21.72.20.42 | 357045290 | 0 |
| 21.72.20.43 | 357045291 | 0 |
| 21.72.20.44 | 357045292 | 0 |
| 21.72.20.45 | 357045293 | 0 |
| 21.72.20.46 | 357045294 | 0 |
| 21.72.20.47 | 357045295 | 0 |
| 21.72.20.48 | 357045296 | 0 |
| 21.72.20.49 | 357045297 | 0 |
| 21.72.20.50 | 357045298 | 0 |
| 21.72.20.51 | 357045299 | 0 |
| 21.72.20.52 | 357045300 | 0 |
| 21.72.20.53 | 357045301 | 0 |
| 21.72.20.54 | 357045302 | 0 |
| 21.72.20.55 | 357045303 | 0 |
| 21.72.20.56 | 357045304 | 0 |
| 21.72.20.57 | 357045305 | 0 |
| 21.72.20.58 | 357045306 | 0 |
| 21.72.20.59 | 357045307 | 0 |
| 21.72.20.60 | 357045308 | 0 |
| 21.72.20.61 | 357045309 | 0 |
| 21.72.20.62 | 357045310 | 0 |
| 21.72.20.63 | 357045311 | 0 |
| 21.72.20.64 | 357045312 | 0 |
| 21.72.20.65 | 357045313 | 0 |
| 21.72.20.66 | 357045314 | 0 |
| 21.72.20.67 | 357045315 | 0 |
| 21.72.20.68 | 357045316 | 0 |
| 21.72.20.69 | 357045317 | 0 |
| 21.72.20.70 | 357045318 | 0 |
| 21.72.20.71 | 357045319 | 0 |
| 21.72.20.72 | 357045320 | 0 |
| 21.72.20.73 | 357045321 | 0 |
| 21.72.20.74 | 357045322 | 0 |
| 21.72.20.75 | 357045323 | 0 |
| 21.72.20.76 | 357045324 | 0 |
| 21.72.20.77 | 357045325 | 0 |
| 21.72.20.78 | 357045326 | 0 |
| 21.72.20.79 | 357045327 | 0 |
| 21.72.20.80 | 357045328 | 0 |
| 21.72.20.81 | 357045329 | 0 |
| 21.72.20.82 | 357045330 | 0 |
| 21.72.20.83 | 357045331 | 0 |
| 21.72.20.84 | 357045332 | 0 |
| 21.72.20.85 | 357045333 | 0 |