The IP address 21.81.48 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 | 09/05/2018 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2018-05-09 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2018-05-09 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.81.48.0 | 357642240 | 0 |
| 21.81.48.1 | 357642241 | 0 |
| 21.81.48.2 | 357642242 | 0 |
| 21.81.48.3 | 357642243 | 0 |
| 21.81.48.4 | 357642244 | 0 |
| 21.81.48.5 | 357642245 | 0 |
| 21.81.48.6 | 357642246 | 0 |
| 21.81.48.7 | 357642247 | 0 |
| 21.81.48.8 | 357642248 | 0 |
| 21.81.48.9 | 357642249 | 0 |
| 21.81.48.10 | 357642250 | 0 |
| 21.81.48.11 | 357642251 | 0 |
| 21.81.48.12 | 357642252 | 0 |
| 21.81.48.13 | 357642253 | 0 |
| 21.81.48.14 | 357642254 | 0 |
| 21.81.48.15 | 357642255 | 0 |
| 21.81.48.16 | 357642256 | 0 |
| 21.81.48.17 | 357642257 | 0 |
| 21.81.48.18 | 357642258 | 0 |
| 21.81.48.19 | 357642259 | 0 |
| 21.81.48.20 | 357642260 | 0 |
| 21.81.48.21 | 357642261 | 0 |
| 21.81.48.22 | 357642262 | 0 |
| 21.81.48.23 | 357642263 | 0 |
| 21.81.48.24 | 357642264 | 0 |
| 21.81.48.25 | 357642265 | 0 |
| 21.81.48.26 | 357642266 | 0 |
| 21.81.48.27 | 357642267 | 0 |
| 21.81.48.28 | 357642268 | 0 |
| 21.81.48.29 | 357642269 | 0 |
| 21.81.48.30 | 357642270 | 0 |
| 21.81.48.31 | 357642271 | 0 |
| 21.81.48.32 | 357642272 | 0 |
| 21.81.48.33 | 357642273 | 0 |
| 21.81.48.34 | 357642274 | 0 |
| 21.81.48.35 | 357642275 | 0 |
| 21.81.48.36 | 357642276 | 0 |
| 21.81.48.37 | 357642277 | 0 |
| 21.81.48.38 | 357642278 | 0 |
| 21.81.48.39 | 357642279 | 0 |
| 21.81.48.40 | 357642280 | 0 |
| 21.81.48.41 | 357642281 | 0 |
| 21.81.48.42 | 357642282 | 0 |
| 21.81.48.43 | 357642283 | 0 |
| 21.81.48.44 | 357642284 | 0 |
| 21.81.48.45 | 357642285 | 0 |
| 21.81.48.46 | 357642286 | 0 |
| 21.81.48.47 | 357642287 | 0 |
| 21.81.48.48 | 357642288 | 0 |
| 21.81.48.49 | 357642289 | 0 |
| 21.81.48.50 | 357642290 | 0 |
| 21.81.48.51 | 357642291 | 0 |
| 21.81.48.52 | 357642292 | 0 |
| 21.81.48.53 | 357642293 | 0 |
| 21.81.48.54 | 357642294 | 0 |
| 21.81.48.55 | 357642295 | 0 |
| 21.81.48.56 | 357642296 | 0 |
| 21.81.48.57 | 357642297 | 0 |
| 21.81.48.58 | 357642298 | 0 |
| 21.81.48.59 | 357642299 | 0 |
| 21.81.48.60 | 357642300 | 0 |
| 21.81.48.61 | 357642301 | 0 |
| 21.81.48.62 | 357642302 | 0 |
| 21.81.48.63 | 357642303 | 0 |
| 21.81.48.64 | 357642304 | 0 |
| 21.81.48.65 | 357642305 | 0 |
| 21.81.48.66 | 357642306 | 0 |
| 21.81.48.67 | 357642307 | 0 |
| 21.81.48.68 | 357642308 | 0 |
| 21.81.48.69 | 357642309 | 0 |
| 21.81.48.70 | 357642310 | 0 |
| 21.81.48.71 | 357642311 | 0 |
| 21.81.48.72 | 357642312 | 0 |
| 21.81.48.73 | 357642313 | 0 |
| 21.81.48.74 | 357642314 | 0 |
| 21.81.48.75 | 357642315 | 0 |
| 21.81.48.76 | 357642316 | 0 |
| 21.81.48.77 | 357642317 | 0 |
| 21.81.48.78 | 357642318 | 0 |
| 21.81.48.79 | 357642319 | 0 |
| 21.81.48.80 | 357642320 | 0 |
| 21.81.48.81 | 357642321 | 0 |
| 21.81.48.82 | 357642322 | 0 |
| 21.81.48.83 | 357642323 | 0 |
| 21.81.48.84 | 357642324 | 0 |
| 21.81.48.85 | 357642325 | 0 |