La dirección IP 21.91.99 es proporcionada por China Education and Research Network Center, que es propiedad de la CIDR (Classless Inter-Domain Routing) 22.30.204.0/23, IP entre 22.30.204.0 a 22.30.205.255 ). El número de sistema autónomo (ASN) es 4538.
| ASN | 4538 |
| IP que comienzan con | 22.30.204.0 |
| IP que termina con | 22.30.205.255 |
| ASN Nombre | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| IP numérica | |
| Registe | |
| Última actualización | 25/12/2018 |

| Código País | País | Región | Ciudad | Latitud | Longitud | Última actualización | |
| IP2Location | US | Estados Unidos | - | Houston | 29,7633 | -95,3633 | 2018-12-25 |
| MaxMind | US | Estados Unidos | - | - | 37,751 | -97,822 | 2018-12-25 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.91.99.0 | 358310656 | 0 |
| 21.91.99.1 | 358310657 | 0 |
| 21.91.99.2 | 358310658 | 0 |
| 21.91.99.3 | 358310659 | 0 |
| 21.91.99.4 | 358310660 | 0 |
| 21.91.99.5 | 358310661 | 0 |
| 21.91.99.6 | 358310662 | 0 |
| 21.91.99.7 | 358310663 | 0 |
| 21.91.99.8 | 358310664 | 0 |
| 21.91.99.9 | 358310665 | 0 |
| 21.91.99.10 | 358310666 | 0 |
| 21.91.99.11 | 358310667 | 0 |
| 21.91.99.12 | 358310668 | 0 |
| 21.91.99.13 | 358310669 | 0 |
| 21.91.99.14 | 358310670 | 0 |
| 21.91.99.15 | 358310671 | 0 |
| 21.91.99.16 | 358310672 | 0 |
| 21.91.99.17 | 358310673 | 0 |
| 21.91.99.18 | 358310674 | 0 |
| 21.91.99.19 | 358310675 | 0 |
| 21.91.99.20 | 358310676 | 0 |
| 21.91.99.21 | 358310677 | 0 |
| 21.91.99.22 | 358310678 | 0 |
| 21.91.99.23 | 358310679 | 0 |
| 21.91.99.24 | 358310680 | 0 |
| 21.91.99.25 | 358310681 | 0 |
| 21.91.99.26 | 358310682 | 0 |
| 21.91.99.27 | 358310683 | 0 |
| 21.91.99.28 | 358310684 | 0 |
| 21.91.99.29 | 358310685 | 0 |
| 21.91.99.30 | 358310686 | 0 |
| 21.91.99.31 | 358310687 | 0 |
| 21.91.99.32 | 358310688 | 0 |
| 21.91.99.33 | 358310689 | 0 |
| 21.91.99.34 | 358310690 | 0 |
| 21.91.99.35 | 358310691 | 0 |
| 21.91.99.36 | 358310692 | 0 |
| 21.91.99.37 | 358310693 | 0 |
| 21.91.99.38 | 358310694 | 0 |
| 21.91.99.39 | 358310695 | 0 |
| 21.91.99.40 | 358310696 | 0 |
| 21.91.99.41 | 358310697 | 0 |
| 21.91.99.42 | 358310698 | 0 |
| 21.91.99.43 | 358310699 | 0 |
| 21.91.99.44 | 358310700 | 0 |
| 21.91.99.45 | 358310701 | 0 |
| 21.91.99.46 | 358310702 | 0 |
| 21.91.99.47 | 358310703 | 0 |
| 21.91.99.48 | 358310704 | 0 |
| 21.91.99.49 | 358310705 | 0 |
| 21.91.99.50 | 358310706 | 0 |
| 21.91.99.51 | 358310707 | 0 |
| 21.91.99.52 | 358310708 | 0 |
| 21.91.99.53 | 358310709 | 0 |
| 21.91.99.54 | 358310710 | 0 |
| 21.91.99.55 | 358310711 | 0 |
| 21.91.99.56 | 358310712 | 0 |
| 21.91.99.57 | 358310713 | 0 |
| 21.91.99.58 | 358310714 | 0 |
| 21.91.99.59 | 358310715 | 0 |
| 21.91.99.60 | 358310716 | 0 |
| 21.91.99.61 | 358310717 | 0 |
| 21.91.99.62 | 358310718 | 0 |
| 21.91.99.63 | 358310719 | 0 |
| 21.91.99.64 | 358310720 | 0 |
| 21.91.99.65 | 358310721 | 0 |
| 21.91.99.66 | 358310722 | 0 |
| 21.91.99.67 | 358310723 | 0 |
| 21.91.99.68 | 358310724 | 0 |
| 21.91.99.69 | 358310725 | 0 |
| 21.91.99.70 | 358310726 | 0 |
| 21.91.99.71 | 358310727 | 0 |
| 21.91.99.72 | 358310728 | 0 |
| 21.91.99.73 | 358310729 | 0 |
| 21.91.99.74 | 358310730 | 0 |
| 21.91.99.75 | 358310731 | 0 |
| 21.91.99.76 | 358310732 | 0 |
| 21.91.99.77 | 358310733 | 0 |
| 21.91.99.78 | 358310734 | 0 |
| 21.91.99.79 | 358310735 | 0 |
| 21.91.99.80 | 358310736 | 0 |
| 21.91.99.81 | 358310737 | 0 |
| 21.91.99.82 | 358310738 | 0 |
| 21.91.99.83 | 358310739 | 0 |
| 21.91.99.84 | 358310740 | 0 |
| 21.91.99.85 | 358310741 | 0 |