La dirección IP 21.97.91 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 | 22/10/2017 |

| Código País | País | Región | Ciudad | Latitud | Longitud | Última actualización | |
| IP2Location | US | Estados Unidos | - | Columbus | 39,9664 | -83,0128 | 2017-10-22 |
| MaxMind | US | Estados Unidos | - | - | 37,751 | -97,822 | 2017-10-22 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.97.91.0 | 358701824 | 0 |
| 21.97.91.1 | 358701825 | 0 |
| 21.97.91.2 | 358701826 | 0 |
| 21.97.91.3 | 358701827 | 0 |
| 21.97.91.4 | 358701828 | 0 |
| 21.97.91.5 | 358701829 | 0 |
| 21.97.91.6 | 358701830 | 0 |
| 21.97.91.7 | 358701831 | 0 |
| 21.97.91.8 | 358701832 | 0 |
| 21.97.91.9 | 358701833 | 0 |
| 21.97.91.10 | 358701834 | 0 |
| 21.97.91.11 | 358701835 | 0 |
| 21.97.91.12 | 358701836 | 0 |
| 21.97.91.13 | 358701837 | 0 |
| 21.97.91.14 | 358701838 | 0 |
| 21.97.91.15 | 358701839 | 0 |
| 21.97.91.16 | 358701840 | 0 |
| 21.97.91.17 | 358701841 | 0 |
| 21.97.91.18 | 358701842 | 0 |
| 21.97.91.19 | 358701843 | 0 |
| 21.97.91.20 | 358701844 | 0 |
| 21.97.91.21 | 358701845 | 0 |
| 21.97.91.22 | 358701846 | 0 |
| 21.97.91.23 | 358701847 | 0 |
| 21.97.91.24 | 358701848 | 0 |
| 21.97.91.25 | 358701849 | 0 |
| 21.97.91.26 | 358701850 | 0 |
| 21.97.91.27 | 358701851 | 0 |
| 21.97.91.28 | 358701852 | 0 |
| 21.97.91.29 | 358701853 | 0 |
| 21.97.91.30 | 358701854 | 0 |
| 21.97.91.31 | 358701855 | 0 |
| 21.97.91.32 | 358701856 | 0 |
| 21.97.91.33 | 358701857 | 0 |
| 21.97.91.34 | 358701858 | 0 |
| 21.97.91.35 | 358701859 | 0 |
| 21.97.91.36 | 358701860 | 0 |
| 21.97.91.37 | 358701861 | 0 |
| 21.97.91.38 | 358701862 | 0 |
| 21.97.91.39 | 358701863 | 0 |
| 21.97.91.40 | 358701864 | 0 |
| 21.97.91.41 | 358701865 | 0 |
| 21.97.91.42 | 358701866 | 0 |
| 21.97.91.43 | 358701867 | 0 |
| 21.97.91.44 | 358701868 | 0 |
| 21.97.91.45 | 358701869 | 0 |
| 21.97.91.46 | 358701870 | 0 |
| 21.97.91.47 | 358701871 | 0 |
| 21.97.91.48 | 358701872 | 0 |
| 21.97.91.49 | 358701873 | 0 |
| 21.97.91.50 | 358701874 | 0 |
| 21.97.91.51 | 358701875 | 0 |
| 21.97.91.52 | 358701876 | 0 |
| 21.97.91.53 | 358701877 | 0 |
| 21.97.91.54 | 358701878 | 0 |
| 21.97.91.55 | 358701879 | 0 |
| 21.97.91.56 | 358701880 | 0 |
| 21.97.91.57 | 358701881 | 0 |
| 21.97.91.58 | 358701882 | 0 |
| 21.97.91.59 | 358701883 | 0 |
| 21.97.91.60 | 358701884 | 0 |
| 21.97.91.61 | 358701885 | 0 |
| 21.97.91.62 | 358701886 | 0 |
| 21.97.91.63 | 358701887 | 0 |
| 21.97.91.64 | 358701888 | 0 |
| 21.97.91.65 | 358701889 | 0 |
| 21.97.91.66 | 358701890 | 0 |
| 21.97.91.67 | 358701891 | 0 |
| 21.97.91.68 | 358701892 | 0 |
| 21.97.91.69 | 358701893 | 0 |
| 21.97.91.70 | 358701894 | 0 |
| 21.97.91.71 | 358701895 | 0 |
| 21.97.91.72 | 358701896 | 0 |
| 21.97.91.73 | 358701897 | 0 |
| 21.97.91.74 | 358701898 | 0 |
| 21.97.91.75 | 358701899 | 0 |
| 21.97.91.76 | 358701900 | 0 |
| 21.97.91.77 | 358701901 | 0 |
| 21.97.91.78 | 358701902 | 0 |
| 21.97.91.79 | 358701903 | 0 |
| 21.97.91.80 | 358701904 | 0 |
| 21.97.91.81 | 358701905 | 0 |
| 21.97.91.82 | 358701906 | 0 |
| 21.97.91.83 | 358701907 | 0 |
| 21.97.91.84 | 358701908 | 0 |
| 21.97.91.85 | 358701909 | 0 |