L'indirizzo IP 21.91.63 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 | 24/09/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Columbus | 39,9664 | -83,0128 | 2017-09-24 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2017-09-24 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.91.63.0 | 358301440 | 0 |
| 21.91.63.1 | 358301441 | 0 |
| 21.91.63.2 | 358301442 | 0 |
| 21.91.63.3 | 358301443 | 0 |
| 21.91.63.4 | 358301444 | 0 |
| 21.91.63.5 | 358301445 | 0 |
| 21.91.63.6 | 358301446 | 0 |
| 21.91.63.7 | 358301447 | 0 |
| 21.91.63.8 | 358301448 | 0 |
| 21.91.63.9 | 358301449 | 0 |
| 21.91.63.10 | 358301450 | 0 |
| 21.91.63.11 | 358301451 | 0 |
| 21.91.63.12 | 358301452 | 0 |
| 21.91.63.13 | 358301453 | 0 |
| 21.91.63.14 | 358301454 | 0 |
| 21.91.63.15 | 358301455 | 0 |
| 21.91.63.16 | 358301456 | 0 |
| 21.91.63.17 | 358301457 | 0 |
| 21.91.63.18 | 358301458 | 0 |
| 21.91.63.19 | 358301459 | 0 |
| 21.91.63.20 | 358301460 | 0 |
| 21.91.63.21 | 358301461 | 0 |
| 21.91.63.22 | 358301462 | 0 |
| 21.91.63.23 | 358301463 | 0 |
| 21.91.63.24 | 358301464 | 0 |
| 21.91.63.25 | 358301465 | 0 |
| 21.91.63.26 | 358301466 | 0 |
| 21.91.63.27 | 358301467 | 0 |
| 21.91.63.28 | 358301468 | 0 |
| 21.91.63.29 | 358301469 | 0 |
| 21.91.63.30 | 358301470 | 0 |
| 21.91.63.31 | 358301471 | 0 |
| 21.91.63.32 | 358301472 | 0 |
| 21.91.63.33 | 358301473 | 0 |
| 21.91.63.34 | 358301474 | 0 |
| 21.91.63.35 | 358301475 | 0 |
| 21.91.63.36 | 358301476 | 0 |
| 21.91.63.37 | 358301477 | 0 |
| 21.91.63.38 | 358301478 | 0 |
| 21.91.63.39 | 358301479 | 0 |
| 21.91.63.40 | 358301480 | 0 |
| 21.91.63.41 | 358301481 | 0 |
| 21.91.63.42 | 358301482 | 0 |
| 21.91.63.43 | 358301483 | 0 |
| 21.91.63.44 | 358301484 | 0 |
| 21.91.63.45 | 358301485 | 0 |
| 21.91.63.46 | 358301486 | 0 |
| 21.91.63.47 | 358301487 | 0 |
| 21.91.63.48 | 358301488 | 0 |
| 21.91.63.49 | 358301489 | 0 |
| 21.91.63.50 | 358301490 | 0 |
| 21.91.63.51 | 358301491 | 0 |
| 21.91.63.52 | 358301492 | 0 |
| 21.91.63.53 | 358301493 | 0 |
| 21.91.63.54 | 358301494 | 0 |
| 21.91.63.55 | 358301495 | 0 |
| 21.91.63.56 | 358301496 | 0 |
| 21.91.63.57 | 358301497 | 0 |
| 21.91.63.58 | 358301498 | 0 |
| 21.91.63.59 | 358301499 | 0 |
| 21.91.63.60 | 358301500 | 0 |
| 21.91.63.61 | 358301501 | 0 |
| 21.91.63.62 | 358301502 | 0 |
| 21.91.63.63 | 358301503 | 0 |
| 21.91.63.64 | 358301504 | 0 |
| 21.91.63.65 | 358301505 | 0 |
| 21.91.63.66 | 358301506 | 0 |
| 21.91.63.67 | 358301507 | 0 |
| 21.91.63.68 | 358301508 | 0 |
| 21.91.63.69 | 358301509 | 0 |
| 21.91.63.70 | 358301510 | 0 |
| 21.91.63.71 | 358301511 | 0 |
| 21.91.63.72 | 358301512 | 0 |
| 21.91.63.73 | 358301513 | 0 |
| 21.91.63.74 | 358301514 | 0 |
| 21.91.63.75 | 358301515 | 0 |
| 21.91.63.76 | 358301516 | 0 |
| 21.91.63.77 | 358301517 | 0 |
| 21.91.63.78 | 358301518 | 0 |
| 21.91.63.79 | 358301519 | 0 |
| 21.91.63.80 | 358301520 | 0 |
| 21.91.63.81 | 358301521 | 0 |
| 21.91.63.82 | 358301522 | 0 |
| 21.91.63.83 | 358301523 | 0 |
| 21.91.63.84 | 358301524 | 0 |
| 21.91.63.85 | 358301525 | 0 |