The IP address 21.78.51 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 | 06/11/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2017-11-06 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2017-11-06 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.78.51.0 | 357446400 | 0 |
| 21.78.51.1 | 357446401 | 0 |
| 21.78.51.2 | 357446402 | 0 |
| 21.78.51.3 | 357446403 | 0 |
| 21.78.51.4 | 357446404 | 0 |
| 21.78.51.5 | 357446405 | 0 |
| 21.78.51.6 | 357446406 | 0 |
| 21.78.51.7 | 357446407 | 0 |
| 21.78.51.8 | 357446408 | 0 |
| 21.78.51.9 | 357446409 | 0 |
| 21.78.51.10 | 357446410 | 0 |
| 21.78.51.11 | 357446411 | 0 |
| 21.78.51.12 | 357446412 | 0 |
| 21.78.51.13 | 357446413 | 0 |
| 21.78.51.14 | 357446414 | 0 |
| 21.78.51.15 | 357446415 | 0 |
| 21.78.51.16 | 357446416 | 0 |
| 21.78.51.17 | 357446417 | 0 |
| 21.78.51.18 | 357446418 | 0 |
| 21.78.51.19 | 357446419 | 0 |
| 21.78.51.20 | 357446420 | 0 |
| 21.78.51.21 | 357446421 | 0 |
| 21.78.51.22 | 357446422 | 0 |
| 21.78.51.23 | 357446423 | 0 |
| 21.78.51.24 | 357446424 | 0 |
| 21.78.51.25 | 357446425 | 0 |
| 21.78.51.26 | 357446426 | 0 |
| 21.78.51.27 | 357446427 | 0 |
| 21.78.51.28 | 357446428 | 0 |
| 21.78.51.29 | 357446429 | 0 |
| 21.78.51.30 | 357446430 | 0 |
| 21.78.51.31 | 357446431 | 0 |
| 21.78.51.32 | 357446432 | 0 |
| 21.78.51.33 | 357446433 | 0 |
| 21.78.51.34 | 357446434 | 0 |
| 21.78.51.35 | 357446435 | 0 |
| 21.78.51.36 | 357446436 | 0 |
| 21.78.51.37 | 357446437 | 0 |
| 21.78.51.38 | 357446438 | 0 |
| 21.78.51.39 | 357446439 | 0 |
| 21.78.51.40 | 357446440 | 0 |
| 21.78.51.41 | 357446441 | 0 |
| 21.78.51.42 | 357446442 | 0 |
| 21.78.51.43 | 357446443 | 0 |
| 21.78.51.44 | 357446444 | 0 |
| 21.78.51.45 | 357446445 | 0 |
| 21.78.51.46 | 357446446 | 0 |
| 21.78.51.47 | 357446447 | 0 |
| 21.78.51.48 | 357446448 | 0 |
| 21.78.51.49 | 357446449 | 0 |
| 21.78.51.50 | 357446450 | 0 |
| 21.78.51.51 | 357446451 | 0 |
| 21.78.51.52 | 357446452 | 0 |
| 21.78.51.53 | 357446453 | 0 |
| 21.78.51.54 | 357446454 | 0 |
| 21.78.51.55 | 357446455 | 0 |
| 21.78.51.56 | 357446456 | 0 |
| 21.78.51.57 | 357446457 | 0 |
| 21.78.51.58 | 357446458 | 0 |
| 21.78.51.59 | 357446459 | 0 |
| 21.78.51.60 | 357446460 | 0 |
| 21.78.51.61 | 357446461 | 0 |
| 21.78.51.62 | 357446462 | 0 |
| 21.78.51.63 | 357446463 | 0 |
| 21.78.51.64 | 357446464 | 0 |
| 21.78.51.65 | 357446465 | 0 |
| 21.78.51.66 | 357446466 | 0 |
| 21.78.51.67 | 357446467 | 0 |
| 21.78.51.68 | 357446468 | 0 |
| 21.78.51.69 | 357446469 | 0 |
| 21.78.51.70 | 357446470 | 0 |
| 21.78.51.71 | 357446471 | 0 |
| 21.78.51.72 | 357446472 | 0 |
| 21.78.51.73 | 357446473 | 0 |
| 21.78.51.74 | 357446474 | 0 |
| 21.78.51.75 | 357446475 | 0 |
| 21.78.51.76 | 357446476 | 0 |
| 21.78.51.77 | 357446477 | 0 |
| 21.78.51.78 | 357446478 | 0 |
| 21.78.51.79 | 357446479 | 0 |
| 21.78.51.80 | 357446480 | 0 |
| 21.78.51.81 | 357446481 | 0 |
| 21.78.51.82 | 357446482 | 0 |
| 21.78.51.83 | 357446483 | 0 |
| 21.78.51.84 | 357446484 | 0 |
| 21.78.51.85 | 357446485 | 0 |