The IP address 21.87.20 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 | 16/09/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2017-09-16 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2017-09-16 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.87.20.0 | 358028288 | 0 |
| 21.87.20.1 | 358028289 | 0 |
| 21.87.20.2 | 358028290 | 0 |
| 21.87.20.3 | 358028291 | 0 |
| 21.87.20.4 | 358028292 | 0 |
| 21.87.20.5 | 358028293 | 0 |
| 21.87.20.6 | 358028294 | 0 |
| 21.87.20.7 | 358028295 | 0 |
| 21.87.20.8 | 358028296 | 0 |
| 21.87.20.9 | 358028297 | 0 |
| 21.87.20.10 | 358028298 | 0 |
| 21.87.20.11 | 358028299 | 0 |
| 21.87.20.12 | 358028300 | 0 |
| 21.87.20.13 | 358028301 | 0 |
| 21.87.20.14 | 358028302 | 0 |
| 21.87.20.15 | 358028303 | 0 |
| 21.87.20.16 | 358028304 | 0 |
| 21.87.20.17 | 358028305 | 0 |
| 21.87.20.18 | 358028306 | 0 |
| 21.87.20.19 | 358028307 | 0 |
| 21.87.20.20 | 358028308 | 0 |
| 21.87.20.21 | 358028309 | 0 |
| 21.87.20.22 | 358028310 | 0 |
| 21.87.20.23 | 358028311 | 0 |
| 21.87.20.24 | 358028312 | 0 |
| 21.87.20.25 | 358028313 | 0 |
| 21.87.20.26 | 358028314 | 0 |
| 21.87.20.27 | 358028315 | 0 |
| 21.87.20.28 | 358028316 | 0 |
| 21.87.20.29 | 358028317 | 0 |
| 21.87.20.30 | 358028318 | 0 |
| 21.87.20.31 | 358028319 | 0 |
| 21.87.20.32 | 358028320 | 0 |
| 21.87.20.33 | 358028321 | 0 |
| 21.87.20.34 | 358028322 | 0 |
| 21.87.20.35 | 358028323 | 0 |
| 21.87.20.36 | 358028324 | 0 |
| 21.87.20.37 | 358028325 | 0 |
| 21.87.20.38 | 358028326 | 0 |
| 21.87.20.39 | 358028327 | 0 |
| 21.87.20.40 | 358028328 | 0 |
| 21.87.20.41 | 358028329 | 0 |
| 21.87.20.42 | 358028330 | 0 |
| 21.87.20.43 | 358028331 | 0 |
| 21.87.20.44 | 358028332 | 0 |
| 21.87.20.45 | 358028333 | 0 |
| 21.87.20.46 | 358028334 | 0 |
| 21.87.20.47 | 358028335 | 0 |
| 21.87.20.48 | 358028336 | 0 |
| 21.87.20.49 | 358028337 | 0 |
| 21.87.20.50 | 358028338 | 0 |
| 21.87.20.51 | 358028339 | 0 |
| 21.87.20.52 | 358028340 | 0 |
| 21.87.20.53 | 358028341 | 0 |
| 21.87.20.54 | 358028342 | 0 |
| 21.87.20.55 | 358028343 | 0 |
| 21.87.20.56 | 358028344 | 0 |
| 21.87.20.57 | 358028345 | 0 |
| 21.87.20.58 | 358028346 | 0 |
| 21.87.20.59 | 358028347 | 0 |
| 21.87.20.60 | 358028348 | 0 |
| 21.87.20.61 | 358028349 | 0 |
| 21.87.20.62 | 358028350 | 0 |
| 21.87.20.63 | 358028351 | 0 |
| 21.87.20.64 | 358028352 | 0 |
| 21.87.20.65 | 358028353 | 0 |
| 21.87.20.66 | 358028354 | 0 |
| 21.87.20.67 | 358028355 | 0 |
| 21.87.20.68 | 358028356 | 0 |
| 21.87.20.69 | 358028357 | 0 |
| 21.87.20.70 | 358028358 | 0 |
| 21.87.20.71 | 358028359 | 0 |
| 21.87.20.72 | 358028360 | 0 |
| 21.87.20.73 | 358028361 | 0 |
| 21.87.20.74 | 358028362 | 0 |
| 21.87.20.75 | 358028363 | 0 |
| 21.87.20.76 | 358028364 | 0 |
| 21.87.20.77 | 358028365 | 0 |
| 21.87.20.78 | 358028366 | 0 |
| 21.87.20.79 | 358028367 | 0 |
| 21.87.20.80 | 358028368 | 0 |
| 21.87.20.81 | 358028369 | 0 |
| 21.87.20.82 | 358028370 | 0 |
| 21.87.20.83 | 358028371 | 0 |
| 21.87.20.84 | 358028372 | 0 |
| 21.87.20.85 | 358028373 | 0 |