L'indirizzo IP 21.99.77 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 | 28/09/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Columbus | 39,9664 | -83,0128 | 2017-09-27 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2017-09-27 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.99.77.0 | 358829312 | 0 |
| 21.99.77.1 | 358829313 | 0 |
| 21.99.77.2 | 358829314 | 0 |
| 21.99.77.3 | 358829315 | 0 |
| 21.99.77.4 | 358829316 | 0 |
| 21.99.77.5 | 358829317 | 0 |
| 21.99.77.6 | 358829318 | 0 |
| 21.99.77.7 | 358829319 | 0 |
| 21.99.77.8 | 358829320 | 0 |
| 21.99.77.9 | 358829321 | 0 |
| 21.99.77.10 | 358829322 | 0 |
| 21.99.77.11 | 358829323 | 0 |
| 21.99.77.12 | 358829324 | 0 |
| 21.99.77.13 | 358829325 | 0 |
| 21.99.77.14 | 358829326 | 0 |
| 21.99.77.15 | 358829327 | 0 |
| 21.99.77.16 | 358829328 | 0 |
| 21.99.77.17 | 358829329 | 0 |
| 21.99.77.18 | 358829330 | 0 |
| 21.99.77.19 | 358829331 | 0 |
| 21.99.77.20 | 358829332 | 0 |
| 21.99.77.21 | 358829333 | 0 |
| 21.99.77.22 | 358829334 | 0 |
| 21.99.77.23 | 358829335 | 0 |
| 21.99.77.24 | 358829336 | 0 |
| 21.99.77.25 | 358829337 | 0 |
| 21.99.77.26 | 358829338 | 0 |
| 21.99.77.27 | 358829339 | 0 |
| 21.99.77.28 | 358829340 | 0 |
| 21.99.77.29 | 358829341 | 0 |
| 21.99.77.30 | 358829342 | 0 |
| 21.99.77.31 | 358829343 | 0 |
| 21.99.77.32 | 358829344 | 0 |
| 21.99.77.33 | 358829345 | 0 |
| 21.99.77.34 | 358829346 | 0 |
| 21.99.77.35 | 358829347 | 0 |
| 21.99.77.36 | 358829348 | 0 |
| 21.99.77.37 | 358829349 | 0 |
| 21.99.77.38 | 358829350 | 0 |
| 21.99.77.39 | 358829351 | 0 |
| 21.99.77.40 | 358829352 | 0 |
| 21.99.77.41 | 358829353 | 0 |
| 21.99.77.42 | 358829354 | 0 |
| 21.99.77.43 | 358829355 | 0 |
| 21.99.77.44 | 358829356 | 0 |
| 21.99.77.45 | 358829357 | 0 |
| 21.99.77.46 | 358829358 | 0 |
| 21.99.77.47 | 358829359 | 0 |
| 21.99.77.48 | 358829360 | 0 |
| 21.99.77.49 | 358829361 | 0 |
| 21.99.77.50 | 358829362 | 0 |
| 21.99.77.51 | 358829363 | 0 |
| 21.99.77.52 | 358829364 | 0 |
| 21.99.77.53 | 358829365 | 0 |
| 21.99.77.54 | 358829366 | 0 |
| 21.99.77.55 | 358829367 | 0 |
| 21.99.77.56 | 358829368 | 0 |
| 21.99.77.57 | 358829369 | 0 |
| 21.99.77.58 | 358829370 | 0 |
| 21.99.77.59 | 358829371 | 0 |
| 21.99.77.60 | 358829372 | 0 |
| 21.99.77.61 | 358829373 | 0 |
| 21.99.77.62 | 358829374 | 0 |
| 21.99.77.63 | 358829375 | 0 |
| 21.99.77.64 | 358829376 | 0 |
| 21.99.77.65 | 358829377 | 0 |
| 21.99.77.66 | 358829378 | 0 |
| 21.99.77.67 | 358829379 | 0 |
| 21.99.77.68 | 358829380 | 0 |
| 21.99.77.69 | 358829381 | 0 |
| 21.99.77.70 | 358829382 | 0 |
| 21.99.77.71 | 358829383 | 0 |
| 21.99.77.72 | 358829384 | 0 |
| 21.99.77.73 | 358829385 | 0 |
| 21.99.77.74 | 358829386 | 0 |
| 21.99.77.75 | 358829387 | 0 |
| 21.99.77.76 | 358829388 | 0 |
| 21.99.77.77 | 358829389 | 0 |
| 21.99.77.78 | 358829390 | 0 |
| 21.99.77.79 | 358829391 | 0 |
| 21.99.77.80 | 358829392 | 0 |
| 21.99.77.81 | 358829393 | 0 |
| 21.99.77.82 | 358829394 | 0 |
| 21.99.77.83 | 358829395 | 0 |
| 21.99.77.84 | 358829396 | 0 |
| 21.99.77.85 | 358829397 | 0 |