The IP address 21.90.51 is provided by China Education and Research Network Center, it's belong to the CDIR (Classless Inter-Domain Routing) 22.30.204.0/23 (range 22.30.204.0 to 22.30.205.255). The autonomous system number (ASN) is 4538.
| ASN | 4538 |
| IP starting by | 22.30.204.0 |
| IP ending by | 22.30.205.255 |
| ASN Name | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| Numerical IP | |
| Registry | |
| Last update | 20/09/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2017-09-20 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2017-09-20 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.90.51.0 | 358232832 | 0 |
| 21.90.51.1 | 358232833 | 0 |
| 21.90.51.2 | 358232834 | 0 |
| 21.90.51.3 | 358232835 | 0 |
| 21.90.51.4 | 358232836 | 0 |
| 21.90.51.5 | 358232837 | 0 |
| 21.90.51.6 | 358232838 | 0 |
| 21.90.51.7 | 358232839 | 0 |
| 21.90.51.8 | 358232840 | 0 |
| 21.90.51.9 | 358232841 | 0 |
| 21.90.51.10 | 358232842 | 0 |
| 21.90.51.11 | 358232843 | 0 |
| 21.90.51.12 | 358232844 | 0 |
| 21.90.51.13 | 358232845 | 0 |
| 21.90.51.14 | 358232846 | 0 |
| 21.90.51.15 | 358232847 | 0 |
| 21.90.51.16 | 358232848 | 0 |
| 21.90.51.17 | 358232849 | 0 |
| 21.90.51.18 | 358232850 | 0 |
| 21.90.51.19 | 358232851 | 0 |
| 21.90.51.20 | 358232852 | 0 |
| 21.90.51.21 | 358232853 | 0 |
| 21.90.51.22 | 358232854 | 0 |
| 21.90.51.23 | 358232855 | 0 |
| 21.90.51.24 | 358232856 | 0 |
| 21.90.51.25 | 358232857 | 0 |
| 21.90.51.26 | 358232858 | 0 |
| 21.90.51.27 | 358232859 | 0 |
| 21.90.51.28 | 358232860 | 0 |
| 21.90.51.29 | 358232861 | 0 |
| 21.90.51.30 | 358232862 | 0 |
| 21.90.51.31 | 358232863 | 0 |
| 21.90.51.32 | 358232864 | 0 |
| 21.90.51.33 | 358232865 | 0 |
| 21.90.51.34 | 358232866 | 0 |
| 21.90.51.35 | 358232867 | 0 |
| 21.90.51.36 | 358232868 | 0 |
| 21.90.51.37 | 358232869 | 0 |
| 21.90.51.38 | 358232870 | 0 |
| 21.90.51.39 | 358232871 | 0 |
| 21.90.51.40 | 358232872 | 0 |
| 21.90.51.41 | 358232873 | 0 |
| 21.90.51.42 | 358232874 | 0 |
| 21.90.51.43 | 358232875 | 0 |
| 21.90.51.44 | 358232876 | 0 |
| 21.90.51.45 | 358232877 | 0 |
| 21.90.51.46 | 358232878 | 0 |
| 21.90.51.47 | 358232879 | 0 |
| 21.90.51.48 | 358232880 | 0 |
| 21.90.51.49 | 358232881 | 0 |
| 21.90.51.50 | 358232882 | 0 |
| 21.90.51.51 | 358232883 | 0 |
| 21.90.51.52 | 358232884 | 0 |
| 21.90.51.53 | 358232885 | 0 |
| 21.90.51.54 | 358232886 | 0 |
| 21.90.51.55 | 358232887 | 0 |
| 21.90.51.56 | 358232888 | 0 |
| 21.90.51.57 | 358232889 | 0 |
| 21.90.51.58 | 358232890 | 0 |
| 21.90.51.59 | 358232891 | 0 |
| 21.90.51.60 | 358232892 | 0 |
| 21.90.51.61 | 358232893 | 0 |
| 21.90.51.62 | 358232894 | 0 |
| 21.90.51.63 | 358232895 | 0 |
| 21.90.51.64 | 358232896 | 0 |
| 21.90.51.65 | 358232897 | 0 |
| 21.90.51.66 | 358232898 | 0 |
| 21.90.51.67 | 358232899 | 0 |
| 21.90.51.68 | 358232900 | 0 |
| 21.90.51.69 | 358232901 | 0 |
| 21.90.51.70 | 358232902 | 0 |
| 21.90.51.71 | 358232903 | 0 |
| 21.90.51.72 | 358232904 | 0 |
| 21.90.51.73 | 358232905 | 0 |
| 21.90.51.74 | 358232906 | 0 |
| 21.90.51.75 | 358232907 | 0 |
| 21.90.51.76 | 358232908 | 0 |
| 21.90.51.77 | 358232909 | 0 |
| 21.90.51.78 | 358232910 | 0 |
| 21.90.51.79 | 358232911 | 0 |
| 21.90.51.80 | 358232912 | 0 |
| 21.90.51.81 | 358232913 | 0 |
| 21.90.51.82 | 358232914 | 0 |
| 21.90.51.83 | 358232915 | 0 |
| 21.90.51.84 | 358232916 | 0 |
| 21.90.51.85 | 358232917 | 0 |