The IP address 21.71.28 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 | 31/07/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2017-07-31 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2017-07-31 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.71.28.0 | 356981760 | 0 |
| 21.71.28.1 | 356981761 | 0 |
| 21.71.28.2 | 356981762 | 0 |
| 21.71.28.3 | 356981763 | 0 |
| 21.71.28.4 | 356981764 | 0 |
| 21.71.28.5 | 356981765 | 0 |
| 21.71.28.6 | 356981766 | 0 |
| 21.71.28.7 | 356981767 | 0 |
| 21.71.28.8 | 356981768 | 0 |
| 21.71.28.9 | 356981769 | 0 |
| 21.71.28.10 | 356981770 | 0 |
| 21.71.28.11 | 356981771 | 0 |
| 21.71.28.12 | 356981772 | 0 |
| 21.71.28.13 | 356981773 | 0 |
| 21.71.28.14 | 356981774 | 0 |
| 21.71.28.15 | 356981775 | 0 |
| 21.71.28.16 | 356981776 | 0 |
| 21.71.28.17 | 356981777 | 0 |
| 21.71.28.18 | 356981778 | 0 |
| 21.71.28.19 | 356981779 | 0 |
| 21.71.28.20 | 356981780 | 0 |
| 21.71.28.21 | 356981781 | 0 |
| 21.71.28.22 | 356981782 | 0 |
| 21.71.28.23 | 356981783 | 0 |
| 21.71.28.24 | 356981784 | 0 |
| 21.71.28.25 | 356981785 | 0 |
| 21.71.28.26 | 356981786 | 0 |
| 21.71.28.27 | 356981787 | 0 |
| 21.71.28.28 | 356981788 | 0 |
| 21.71.28.29 | 356981789 | 0 |
| 21.71.28.30 | 356981790 | 0 |
| 21.71.28.31 | 356981791 | 0 |
| 21.71.28.32 | 356981792 | 0 |
| 21.71.28.33 | 356981793 | 0 |
| 21.71.28.34 | 356981794 | 0 |
| 21.71.28.35 | 356981795 | 0 |
| 21.71.28.36 | 356981796 | 0 |
| 21.71.28.37 | 356981797 | 0 |
| 21.71.28.38 | 356981798 | 0 |
| 21.71.28.39 | 356981799 | 0 |
| 21.71.28.40 | 356981800 | 0 |
| 21.71.28.41 | 356981801 | 0 |
| 21.71.28.42 | 356981802 | 0 |
| 21.71.28.43 | 356981803 | 0 |
| 21.71.28.44 | 356981804 | 0 |
| 21.71.28.45 | 356981805 | 0 |
| 21.71.28.46 | 356981806 | 0 |
| 21.71.28.47 | 356981807 | 0 |
| 21.71.28.48 | 356981808 | 0 |
| 21.71.28.49 | 356981809 | 0 |
| 21.71.28.50 | 356981810 | 0 |
| 21.71.28.51 | 356981811 | 0 |
| 21.71.28.52 | 356981812 | 0 |
| 21.71.28.53 | 356981813 | 0 |
| 21.71.28.54 | 356981814 | 0 |
| 21.71.28.55 | 356981815 | 0 |
| 21.71.28.56 | 356981816 | 0 |
| 21.71.28.57 | 356981817 | 0 |
| 21.71.28.58 | 356981818 | 0 |
| 21.71.28.59 | 356981819 | 0 |
| 21.71.28.60 | 356981820 | 0 |
| 21.71.28.61 | 356981821 | 0 |
| 21.71.28.62 | 356981822 | 0 |
| 21.71.28.63 | 356981823 | 0 |
| 21.71.28.64 | 356981824 | 0 |
| 21.71.28.65 | 356981825 | 0 |
| 21.71.28.66 | 356981826 | 0 |
| 21.71.28.67 | 356981827 | 0 |
| 21.71.28.68 | 356981828 | 0 |
| 21.71.28.69 | 356981829 | 0 |
| 21.71.28.70 | 356981830 | 0 |
| 21.71.28.71 | 356981831 | 0 |
| 21.71.28.72 | 356981832 | 0 |
| 21.71.28.73 | 356981833 | 0 |
| 21.71.28.74 | 356981834 | 0 |
| 21.71.28.75 | 356981835 | 0 |
| 21.71.28.76 | 356981836 | 0 |
| 21.71.28.77 | 356981837 | 0 |
| 21.71.28.78 | 356981838 | 0 |
| 21.71.28.79 | 356981839 | 0 |
| 21.71.28.80 | 356981840 | 0 |
| 21.71.28.81 | 356981841 | 0 |
| 21.71.28.82 | 356981842 | 0 |
| 21.71.28.83 | 356981843 | 0 |
| 21.71.28.84 | 356981844 | 0 |
| 21.71.28.85 | 356981845 | 0 |