La dirección IP 21.91.37 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 | 03/08/2017 |

| Código País | País | Región | Ciudad | Latitud | Longitud | Última actualización | |
| IP2Location | US | Estados Unidos | - | Columbus | 39,9664 | -83,0128 | 2017-08-02 |
| MaxMind | US | Estados Unidos | - | - | 37,751 | -97,822 | 2017-08-02 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.91.37.0 | 358294784 | 0 |
| 21.91.37.1 | 358294785 | 0 |
| 21.91.37.2 | 358294786 | 0 |
| 21.91.37.3 | 358294787 | 0 |
| 21.91.37.4 | 358294788 | 0 |
| 21.91.37.5 | 358294789 | 0 |
| 21.91.37.6 | 358294790 | 0 |
| 21.91.37.7 | 358294791 | 0 |
| 21.91.37.8 | 358294792 | 0 |
| 21.91.37.9 | 358294793 | 0 |
| 21.91.37.10 | 358294794 | 0 |
| 21.91.37.11 | 358294795 | 0 |
| 21.91.37.12 | 358294796 | 0 |
| 21.91.37.13 | 358294797 | 0 |
| 21.91.37.14 | 358294798 | 0 |
| 21.91.37.15 | 358294799 | 0 |
| 21.91.37.16 | 358294800 | 0 |
| 21.91.37.17 | 358294801 | 0 |
| 21.91.37.18 | 358294802 | 0 |
| 21.91.37.19 | 358294803 | 0 |
| 21.91.37.20 | 358294804 | 0 |
| 21.91.37.21 | 358294805 | 0 |
| 21.91.37.22 | 358294806 | 0 |
| 21.91.37.23 | 358294807 | 0 |
| 21.91.37.24 | 358294808 | 0 |
| 21.91.37.25 | 358294809 | 0 |
| 21.91.37.26 | 358294810 | 0 |
| 21.91.37.27 | 358294811 | 0 |
| 21.91.37.28 | 358294812 | 0 |
| 21.91.37.29 | 358294813 | 0 |
| 21.91.37.30 | 358294814 | 0 |
| 21.91.37.31 | 358294815 | 0 |
| 21.91.37.32 | 358294816 | 0 |
| 21.91.37.33 | 358294817 | 0 |
| 21.91.37.34 | 358294818 | 0 |
| 21.91.37.35 | 358294819 | 0 |
| 21.91.37.36 | 358294820 | 0 |
| 21.91.37.37 | 358294821 | 0 |
| 21.91.37.38 | 358294822 | 0 |
| 21.91.37.39 | 358294823 | 0 |
| 21.91.37.40 | 358294824 | 0 |
| 21.91.37.41 | 358294825 | 0 |
| 21.91.37.42 | 358294826 | 0 |
| 21.91.37.43 | 358294827 | 0 |
| 21.91.37.44 | 358294828 | 0 |
| 21.91.37.45 | 358294829 | 0 |
| 21.91.37.46 | 358294830 | 0 |
| 21.91.37.47 | 358294831 | 0 |
| 21.91.37.48 | 358294832 | 0 |
| 21.91.37.49 | 358294833 | 0 |
| 21.91.37.50 | 358294834 | 0 |
| 21.91.37.51 | 358294835 | 0 |
| 21.91.37.52 | 358294836 | 0 |
| 21.91.37.53 | 358294837 | 0 |
| 21.91.37.54 | 358294838 | 0 |
| 21.91.37.55 | 358294839 | 0 |
| 21.91.37.56 | 358294840 | 0 |
| 21.91.37.57 | 358294841 | 0 |
| 21.91.37.58 | 358294842 | 0 |
| 21.91.37.59 | 358294843 | 0 |
| 21.91.37.60 | 358294844 | 0 |
| 21.91.37.61 | 358294845 | 0 |
| 21.91.37.62 | 358294846 | 0 |
| 21.91.37.63 | 358294847 | 0 |
| 21.91.37.64 | 358294848 | 0 |
| 21.91.37.65 | 358294849 | 0 |
| 21.91.37.66 | 358294850 | 0 |
| 21.91.37.67 | 358294851 | 0 |
| 21.91.37.68 | 358294852 | 0 |
| 21.91.37.69 | 358294853 | 0 |
| 21.91.37.70 | 358294854 | 0 |
| 21.91.37.71 | 358294855 | 0 |
| 21.91.37.72 | 358294856 | 0 |
| 21.91.37.73 | 358294857 | 0 |
| 21.91.37.74 | 358294858 | 0 |
| 21.91.37.75 | 358294859 | 0 |
| 21.91.37.76 | 358294860 | 0 |
| 21.91.37.77 | 358294861 | 0 |
| 21.91.37.78 | 358294862 | 0 |
| 21.91.37.79 | 358294863 | 0 |
| 21.91.37.80 | 358294864 | 0 |
| 21.91.37.81 | 358294865 | 0 |
| 21.91.37.82 | 358294866 | 0 |
| 21.91.37.83 | 358294867 | 0 |
| 21.91.37.84 | 358294868 | 0 |
| 21.91.37.85 | 358294869 | 0 |