The IP address 21.81.47 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 | 11/12/2018 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Houston | 29.7633 | -95.3633 | 2018-12-11 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2018-12-11 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.81.47.0 | 357641984 | 0 |
| 21.81.47.1 | 357641985 | 0 |
| 21.81.47.2 | 357641986 | 0 |
| 21.81.47.3 | 357641987 | 0 |
| 21.81.47.4 | 357641988 | 0 |
| 21.81.47.5 | 357641989 | 0 |
| 21.81.47.6 | 357641990 | 0 |
| 21.81.47.7 | 357641991 | 0 |
| 21.81.47.8 | 357641992 | 0 |
| 21.81.47.9 | 357641993 | 0 |
| 21.81.47.10 | 357641994 | 0 |
| 21.81.47.11 | 357641995 | 0 |
| 21.81.47.12 | 357641996 | 0 |
| 21.81.47.13 | 357641997 | 0 |
| 21.81.47.14 | 357641998 | 0 |
| 21.81.47.15 | 357641999 | 0 |
| 21.81.47.16 | 357642000 | 0 |
| 21.81.47.17 | 357642001 | 0 |
| 21.81.47.18 | 357642002 | 0 |
| 21.81.47.19 | 357642003 | 0 |
| 21.81.47.20 | 357642004 | 0 |
| 21.81.47.21 | 357642005 | 0 |
| 21.81.47.22 | 357642006 | 0 |
| 21.81.47.23 | 357642007 | 0 |
| 21.81.47.24 | 357642008 | 0 |
| 21.81.47.25 | 357642009 | 0 |
| 21.81.47.26 | 357642010 | 0 |
| 21.81.47.27 | 357642011 | 0 |
| 21.81.47.28 | 357642012 | 0 |
| 21.81.47.29 | 357642013 | 0 |
| 21.81.47.30 | 357642014 | 0 |
| 21.81.47.31 | 357642015 | 0 |
| 21.81.47.32 | 357642016 | 0 |
| 21.81.47.33 | 357642017 | 0 |
| 21.81.47.34 | 357642018 | 0 |
| 21.81.47.35 | 357642019 | 0 |
| 21.81.47.36 | 357642020 | 0 |
| 21.81.47.37 | 357642021 | 0 |
| 21.81.47.38 | 357642022 | 0 |
| 21.81.47.39 | 357642023 | 0 |
| 21.81.47.40 | 357642024 | 0 |
| 21.81.47.41 | 357642025 | 0 |
| 21.81.47.42 | 357642026 | 0 |
| 21.81.47.43 | 357642027 | 0 |
| 21.81.47.44 | 357642028 | 0 |
| 21.81.47.45 | 357642029 | 0 |
| 21.81.47.46 | 357642030 | 0 |
| 21.81.47.47 | 357642031 | 0 |
| 21.81.47.48 | 357642032 | 0 |
| 21.81.47.49 | 357642033 | 0 |
| 21.81.47.50 | 357642034 | 0 |
| 21.81.47.51 | 357642035 | 0 |
| 21.81.47.52 | 357642036 | 0 |
| 21.81.47.53 | 357642037 | 0 |
| 21.81.47.54 | 357642038 | 0 |
| 21.81.47.55 | 357642039 | 0 |
| 21.81.47.56 | 357642040 | 0 |
| 21.81.47.57 | 357642041 | 0 |
| 21.81.47.58 | 357642042 | 0 |
| 21.81.47.59 | 357642043 | 0 |
| 21.81.47.60 | 357642044 | 0 |
| 21.81.47.61 | 357642045 | 0 |
| 21.81.47.62 | 357642046 | 0 |
| 21.81.47.63 | 357642047 | 0 |
| 21.81.47.64 | 357642048 | 0 |
| 21.81.47.65 | 357642049 | 0 |
| 21.81.47.66 | 357642050 | 0 |
| 21.81.47.67 | 357642051 | 0 |
| 21.81.47.68 | 357642052 | 0 |
| 21.81.47.69 | 357642053 | 0 |
| 21.81.47.70 | 357642054 | 0 |
| 21.81.47.71 | 357642055 | 0 |
| 21.81.47.72 | 357642056 | 0 |
| 21.81.47.73 | 357642057 | 0 |
| 21.81.47.74 | 357642058 | 0 |
| 21.81.47.75 | 357642059 | 0 |
| 21.81.47.76 | 357642060 | 0 |
| 21.81.47.77 | 357642061 | 0 |
| 21.81.47.78 | 357642062 | 0 |
| 21.81.47.79 | 357642063 | 0 |
| 21.81.47.80 | 357642064 | 0 |
| 21.81.47.81 | 357642065 | 0 |
| 21.81.47.82 | 357642066 | 0 |
| 21.81.47.83 | 357642067 | 0 |
| 21.81.47.84 | 357642068 | 0 |
| 21.81.47.85 | 357642069 | 0 |