Les adresses IP débutant par 21.91.78 sont fournies par China Education and Research Network Center, elles appartiennent au CIDR (Classless Inter-Domain Routing) 22.30.204.0/23, le bloc IP comprant les adresses de 22.30.204.0 à 22.30.205.255). Le numéro de système autonome (ASN) est 4538.
| ASN | 4538 |
| IP commençant par | 22.30.204.0 |
| IP se terminant par | 22.30.205.255 |
| Nom ASN | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| IP numérique | |
| Registe | |
| Dernière mise à jour | 31/07/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-07-30 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-07-30 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.91.78.0 | 358305280 | 0 |
| 21.91.78.1 | 358305281 | 0 |
| 21.91.78.2 | 358305282 | 0 |
| 21.91.78.3 | 358305283 | 0 |
| 21.91.78.4 | 358305284 | 0 |
| 21.91.78.5 | 358305285 | 0 |
| 21.91.78.6 | 358305286 | 0 |
| 21.91.78.7 | 358305287 | 0 |
| 21.91.78.8 | 358305288 | 0 |
| 21.91.78.9 | 358305289 | 0 |
| 21.91.78.10 | 358305290 | 0 |
| 21.91.78.11 | 358305291 | 0 |
| 21.91.78.12 | 358305292 | 0 |
| 21.91.78.13 | 358305293 | 0 |
| 21.91.78.14 | 358305294 | 0 |
| 21.91.78.15 | 358305295 | 0 |
| 21.91.78.16 | 358305296 | 0 |
| 21.91.78.17 | 358305297 | 0 |
| 21.91.78.18 | 358305298 | 0 |
| 21.91.78.19 | 358305299 | 0 |
| 21.91.78.20 | 358305300 | 0 |
| 21.91.78.21 | 358305301 | 0 |
| 21.91.78.22 | 358305302 | 0 |
| 21.91.78.23 | 358305303 | 0 |
| 21.91.78.24 | 358305304 | 0 |
| 21.91.78.25 | 358305305 | 0 |
| 21.91.78.26 | 358305306 | 0 |
| 21.91.78.27 | 358305307 | 0 |
| 21.91.78.28 | 358305308 | 0 |
| 21.91.78.29 | 358305309 | 0 |
| 21.91.78.30 | 358305310 | 0 |
| 21.91.78.31 | 358305311 | 0 |
| 21.91.78.32 | 358305312 | 0 |
| 21.91.78.33 | 358305313 | 0 |
| 21.91.78.34 | 358305314 | 0 |
| 21.91.78.35 | 358305315 | 0 |
| 21.91.78.36 | 358305316 | 0 |
| 21.91.78.37 | 358305317 | 0 |
| 21.91.78.38 | 358305318 | 0 |
| 21.91.78.39 | 358305319 | 0 |
| 21.91.78.40 | 358305320 | 0 |
| 21.91.78.41 | 358305321 | 0 |
| 21.91.78.42 | 358305322 | 0 |
| 21.91.78.43 | 358305323 | 0 |
| 21.91.78.44 | 358305324 | 0 |
| 21.91.78.45 | 358305325 | 0 |
| 21.91.78.46 | 358305326 | 0 |
| 21.91.78.47 | 358305327 | 0 |
| 21.91.78.48 | 358305328 | 0 |
| 21.91.78.49 | 358305329 | 0 |
| 21.91.78.50 | 358305330 | 0 |
| 21.91.78.51 | 358305331 | 0 |
| 21.91.78.52 | 358305332 | 0 |
| 21.91.78.53 | 358305333 | 0 |
| 21.91.78.54 | 358305334 | 0 |
| 21.91.78.55 | 358305335 | 0 |
| 21.91.78.56 | 358305336 | 0 |
| 21.91.78.57 | 358305337 | 0 |
| 21.91.78.58 | 358305338 | 0 |
| 21.91.78.59 | 358305339 | 0 |
| 21.91.78.60 | 358305340 | 0 |
| 21.91.78.61 | 358305341 | 0 |
| 21.91.78.62 | 358305342 | 0 |
| 21.91.78.63 | 358305343 | 0 |
| 21.91.78.64 | 358305344 | 0 |
| 21.91.78.65 | 358305345 | 0 |
| 21.91.78.66 | 358305346 | 0 |
| 21.91.78.67 | 358305347 | 0 |
| 21.91.78.68 | 358305348 | 0 |
| 21.91.78.69 | 358305349 | 0 |
| 21.91.78.70 | 358305350 | 0 |
| 21.91.78.71 | 358305351 | 0 |
| 21.91.78.72 | 358305352 | 0 |
| 21.91.78.73 | 358305353 | 0 |
| 21.91.78.74 | 358305354 | 0 |
| 21.91.78.75 | 358305355 | 0 |
| 21.91.78.76 | 358305356 | 0 |
| 21.91.78.77 | 358305357 | 0 |
| 21.91.78.78 | 358305358 | 0 |
| 21.91.78.79 | 358305359 | 0 |
| 21.91.78.80 | 358305360 | 0 |
| 21.91.78.81 | 358305361 | 0 |
| 21.91.78.82 | 358305362 | 0 |
| 21.91.78.83 | 358305363 | 0 |
| 21.91.78.84 | 358305364 | 0 |
| 21.91.78.85 | 358305365 | 0 |