L'indirizzo IP 21.97.51 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 | 19/02/2018 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Columbus | 39,9664 | -83,0128 | 2018-02-18 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2018-02-18 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.97.51.0 | 358691584 | 0 |
| 21.97.51.1 | 358691585 | 0 |
| 21.97.51.2 | 358691586 | 0 |
| 21.97.51.3 | 358691587 | 0 |
| 21.97.51.4 | 358691588 | 0 |
| 21.97.51.5 | 358691589 | 0 |
| 21.97.51.6 | 358691590 | 0 |
| 21.97.51.7 | 358691591 | 0 |
| 21.97.51.8 | 358691592 | 0 |
| 21.97.51.9 | 358691593 | 0 |
| 21.97.51.10 | 358691594 | 0 |
| 21.97.51.11 | 358691595 | 0 |
| 21.97.51.12 | 358691596 | 0 |
| 21.97.51.13 | 358691597 | 0 |
| 21.97.51.14 | 358691598 | 0 |
| 21.97.51.15 | 358691599 | 0 |
| 21.97.51.16 | 358691600 | 0 |
| 21.97.51.17 | 358691601 | 0 |
| 21.97.51.18 | 358691602 | 0 |
| 21.97.51.19 | 358691603 | 0 |
| 21.97.51.20 | 358691604 | 0 |
| 21.97.51.21 | 358691605 | 0 |
| 21.97.51.22 | 358691606 | 0 |
| 21.97.51.23 | 358691607 | 0 |
| 21.97.51.24 | 358691608 | 0 |
| 21.97.51.25 | 358691609 | 0 |
| 21.97.51.26 | 358691610 | 0 |
| 21.97.51.27 | 358691611 | 0 |
| 21.97.51.28 | 358691612 | 0 |
| 21.97.51.29 | 358691613 | 0 |
| 21.97.51.30 | 358691614 | 0 |
| 21.97.51.31 | 358691615 | 0 |
| 21.97.51.32 | 358691616 | 0 |
| 21.97.51.33 | 358691617 | 0 |
| 21.97.51.34 | 358691618 | 0 |
| 21.97.51.35 | 358691619 | 0 |
| 21.97.51.36 | 358691620 | 0 |
| 21.97.51.37 | 358691621 | 0 |
| 21.97.51.38 | 358691622 | 0 |
| 21.97.51.39 | 358691623 | 0 |
| 21.97.51.40 | 358691624 | 0 |
| 21.97.51.41 | 358691625 | 0 |
| 21.97.51.42 | 358691626 | 0 |
| 21.97.51.43 | 358691627 | 0 |
| 21.97.51.44 | 358691628 | 0 |
| 21.97.51.45 | 358691629 | 0 |
| 21.97.51.46 | 358691630 | 0 |
| 21.97.51.47 | 358691631 | 0 |
| 21.97.51.48 | 358691632 | 0 |
| 21.97.51.49 | 358691633 | 0 |
| 21.97.51.50 | 358691634 | 0 |
| 21.97.51.51 | 358691635 | 0 |
| 21.97.51.52 | 358691636 | 0 |
| 21.97.51.53 | 358691637 | 0 |
| 21.97.51.54 | 358691638 | 0 |
| 21.97.51.55 | 358691639 | 0 |
| 21.97.51.56 | 358691640 | 0 |
| 21.97.51.57 | 358691641 | 0 |
| 21.97.51.58 | 358691642 | 0 |
| 21.97.51.59 | 358691643 | 0 |
| 21.97.51.60 | 358691644 | 0 |
| 21.97.51.61 | 358691645 | 0 |
| 21.97.51.62 | 358691646 | 0 |
| 21.97.51.63 | 358691647 | 0 |
| 21.97.51.64 | 358691648 | 0 |
| 21.97.51.65 | 358691649 | 0 |
| 21.97.51.66 | 358691650 | 0 |
| 21.97.51.67 | 358691651 | 0 |
| 21.97.51.68 | 358691652 | 0 |
| 21.97.51.69 | 358691653 | 0 |
| 21.97.51.70 | 358691654 | 0 |
| 21.97.51.71 | 358691655 | 0 |
| 21.97.51.72 | 358691656 | 0 |
| 21.97.51.73 | 358691657 | 0 |
| 21.97.51.74 | 358691658 | 0 |
| 21.97.51.75 | 358691659 | 0 |
| 21.97.51.76 | 358691660 | 0 |
| 21.97.51.77 | 358691661 | 0 |
| 21.97.51.78 | 358691662 | 0 |
| 21.97.51.79 | 358691663 | 0 |
| 21.97.51.80 | 358691664 | 0 |
| 21.97.51.81 | 358691665 | 0 |
| 21.97.51.82 | 358691666 | 0 |
| 21.97.51.83 | 358691667 | 0 |
| 21.97.51.84 | 358691668 | 0 |
| 21.97.51.85 | 358691669 | 0 |