L'indirizzo IP 21.87.99 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 | 01/02/2018 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Columbus | 39,9664 | -83,0128 | 2018-01-31 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2018-01-31 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.87.99.0 | 358048512 | 0 |
| 21.87.99.1 | 358048513 | 0 |
| 21.87.99.2 | 358048514 | 0 |
| 21.87.99.3 | 358048515 | 0 |
| 21.87.99.4 | 358048516 | 0 |
| 21.87.99.5 | 358048517 | 0 |
| 21.87.99.6 | 358048518 | 0 |
| 21.87.99.7 | 358048519 | 0 |
| 21.87.99.8 | 358048520 | 0 |
| 21.87.99.9 | 358048521 | 0 |
| 21.87.99.10 | 358048522 | 0 |
| 21.87.99.11 | 358048523 | 0 |
| 21.87.99.12 | 358048524 | 0 |
| 21.87.99.13 | 358048525 | 0 |
| 21.87.99.14 | 358048526 | 0 |
| 21.87.99.15 | 358048527 | 0 |
| 21.87.99.16 | 358048528 | 0 |
| 21.87.99.17 | 358048529 | 0 |
| 21.87.99.18 | 358048530 | 0 |
| 21.87.99.19 | 358048531 | 0 |
| 21.87.99.20 | 358048532 | 0 |
| 21.87.99.21 | 358048533 | 0 |
| 21.87.99.22 | 358048534 | 0 |
| 21.87.99.23 | 358048535 | 0 |
| 21.87.99.24 | 358048536 | 0 |
| 21.87.99.25 | 358048537 | 0 |
| 21.87.99.26 | 358048538 | 0 |
| 21.87.99.27 | 358048539 | 0 |
| 21.87.99.28 | 358048540 | 0 |
| 21.87.99.29 | 358048541 | 0 |
| 21.87.99.30 | 358048542 | 0 |
| 21.87.99.31 | 358048543 | 0 |
| 21.87.99.32 | 358048544 | 0 |
| 21.87.99.33 | 358048545 | 0 |
| 21.87.99.34 | 358048546 | 0 |
| 21.87.99.35 | 358048547 | 0 |
| 21.87.99.36 | 358048548 | 0 |
| 21.87.99.37 | 358048549 | 0 |
| 21.87.99.38 | 358048550 | 0 |
| 21.87.99.39 | 358048551 | 0 |
| 21.87.99.40 | 358048552 | 0 |
| 21.87.99.41 | 358048553 | 0 |
| 21.87.99.42 | 358048554 | 0 |
| 21.87.99.43 | 358048555 | 0 |
| 21.87.99.44 | 358048556 | 0 |
| 21.87.99.45 | 358048557 | 0 |
| 21.87.99.46 | 358048558 | 0 |
| 21.87.99.47 | 358048559 | 0 |
| 21.87.99.48 | 358048560 | 0 |
| 21.87.99.49 | 358048561 | 0 |
| 21.87.99.50 | 358048562 | 0 |
| 21.87.99.51 | 358048563 | 0 |
| 21.87.99.52 | 358048564 | 0 |
| 21.87.99.53 | 358048565 | 0 |
| 21.87.99.54 | 358048566 | 0 |
| 21.87.99.55 | 358048567 | 0 |
| 21.87.99.56 | 358048568 | 0 |
| 21.87.99.57 | 358048569 | 0 |
| 21.87.99.58 | 358048570 | 0 |
| 21.87.99.59 | 358048571 | 0 |
| 21.87.99.60 | 358048572 | 0 |
| 21.87.99.61 | 358048573 | 0 |
| 21.87.99.62 | 358048574 | 0 |
| 21.87.99.63 | 358048575 | 0 |
| 21.87.99.64 | 358048576 | 0 |
| 21.87.99.65 | 358048577 | 0 |
| 21.87.99.66 | 358048578 | 0 |
| 21.87.99.67 | 358048579 | 0 |
| 21.87.99.68 | 358048580 | 0 |
| 21.87.99.69 | 358048581 | 0 |
| 21.87.99.70 | 358048582 | 0 |
| 21.87.99.71 | 358048583 | 0 |
| 21.87.99.72 | 358048584 | 0 |
| 21.87.99.73 | 358048585 | 0 |
| 21.87.99.74 | 358048586 | 0 |
| 21.87.99.75 | 358048587 | 0 |
| 21.87.99.76 | 358048588 | 0 |
| 21.87.99.77 | 358048589 | 0 |
| 21.87.99.78 | 358048590 | 0 |
| 21.87.99.79 | 358048591 | 0 |
| 21.87.99.80 | 358048592 | 0 |
| 21.87.99.81 | 358048593 | 0 |
| 21.87.99.82 | 358048594 | 0 |
| 21.87.99.83 | 358048595 | 0 |
| 21.87.99.84 | 358048596 | 0 |
| 21.87.99.85 | 358048597 | 0 |