Les adresses IP débutant par 21.97.87 sont fournies par China Education and Research Network Center, elles appartiennent au CIDR (Classless Inter-Domain Routing) 22.30.204.0/23, le bloc IP comprant les adresses de 22.30.204.0 à 22.30.205.255). Le numéro de système autonome (ASN) est 4538.
| ASN | 4538 |
| IP commençant par | 22.30.204.0 |
| IP se terminant par | 22.30.205.255 |
| Nom ASN | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| IP numérique | |
| Registe | |
| Dernière mise à jour | 26/09/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-09-25 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-09-25 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.97.87.0 | 358700800 | 0 |
| 21.97.87.1 | 358700801 | 0 |
| 21.97.87.2 | 358700802 | 0 |
| 21.97.87.3 | 358700803 | 0 |
| 21.97.87.4 | 358700804 | 0 |
| 21.97.87.5 | 358700805 | 0 |
| 21.97.87.6 | 358700806 | 0 |
| 21.97.87.7 | 358700807 | 0 |
| 21.97.87.8 | 358700808 | 0 |
| 21.97.87.9 | 358700809 | 0 |
| 21.97.87.10 | 358700810 | 0 |
| 21.97.87.11 | 358700811 | 0 |
| 21.97.87.12 | 358700812 | 0 |
| 21.97.87.13 | 358700813 | 0 |
| 21.97.87.14 | 358700814 | 0 |
| 21.97.87.15 | 358700815 | 0 |
| 21.97.87.16 | 358700816 | 0 |
| 21.97.87.17 | 358700817 | 0 |
| 21.97.87.18 | 358700818 | 0 |
| 21.97.87.19 | 358700819 | 0 |
| 21.97.87.20 | 358700820 | 0 |
| 21.97.87.21 | 358700821 | 0 |
| 21.97.87.22 | 358700822 | 0 |
| 21.97.87.23 | 358700823 | 0 |
| 21.97.87.24 | 358700824 | 0 |
| 21.97.87.25 | 358700825 | 0 |
| 21.97.87.26 | 358700826 | 0 |
| 21.97.87.27 | 358700827 | 0 |
| 21.97.87.28 | 358700828 | 0 |
| 21.97.87.29 | 358700829 | 0 |
| 21.97.87.30 | 358700830 | 0 |
| 21.97.87.31 | 358700831 | 0 |
| 21.97.87.32 | 358700832 | 0 |
| 21.97.87.33 | 358700833 | 0 |
| 21.97.87.34 | 358700834 | 0 |
| 21.97.87.35 | 358700835 | 0 |
| 21.97.87.36 | 358700836 | 0 |
| 21.97.87.37 | 358700837 | 0 |
| 21.97.87.38 | 358700838 | 0 |
| 21.97.87.39 | 358700839 | 0 |
| 21.97.87.40 | 358700840 | 0 |
| 21.97.87.41 | 358700841 | 0 |
| 21.97.87.42 | 358700842 | 0 |
| 21.97.87.43 | 358700843 | 0 |
| 21.97.87.44 | 358700844 | 0 |
| 21.97.87.45 | 358700845 | 0 |
| 21.97.87.46 | 358700846 | 0 |
| 21.97.87.47 | 358700847 | 0 |
| 21.97.87.48 | 358700848 | 0 |
| 21.97.87.49 | 358700849 | 0 |
| 21.97.87.50 | 358700850 | 0 |
| 21.97.87.51 | 358700851 | 0 |
| 21.97.87.52 | 358700852 | 0 |
| 21.97.87.53 | 358700853 | 0 |
| 21.97.87.54 | 358700854 | 0 |
| 21.97.87.55 | 358700855 | 0 |
| 21.97.87.56 | 358700856 | 0 |
| 21.97.87.57 | 358700857 | 0 |
| 21.97.87.58 | 358700858 | 0 |
| 21.97.87.59 | 358700859 | 0 |
| 21.97.87.60 | 358700860 | 0 |
| 21.97.87.61 | 358700861 | 0 |
| 21.97.87.62 | 358700862 | 0 |
| 21.97.87.63 | 358700863 | 0 |
| 21.97.87.64 | 358700864 | 0 |
| 21.97.87.65 | 358700865 | 0 |
| 21.97.87.66 | 358700866 | 0 |
| 21.97.87.67 | 358700867 | 0 |
| 21.97.87.68 | 358700868 | 0 |
| 21.97.87.69 | 358700869 | 0 |
| 21.97.87.70 | 358700870 | 0 |
| 21.97.87.71 | 358700871 | 0 |
| 21.97.87.72 | 358700872 | 0 |
| 21.97.87.73 | 358700873 | 0 |
| 21.97.87.74 | 358700874 | 0 |
| 21.97.87.75 | 358700875 | 0 |
| 21.97.87.76 | 358700876 | 0 |
| 21.97.87.77 | 358700877 | 0 |
| 21.97.87.78 | 358700878 | 0 |
| 21.97.87.79 | 358700879 | 0 |
| 21.97.87.80 | 358700880 | 0 |
| 21.97.87.81 | 358700881 | 0 |
| 21.97.87.82 | 358700882 | 0 |
| 21.97.87.83 | 358700883 | 0 |
| 21.97.87.84 | 358700884 | 0 |
| 21.97.87.85 | 358700885 | 0 |