Les adresses IP débutant par 21.90.71 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 | 12/10/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-10-12 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-10-12 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.90.71.0 | 358237952 | 0 |
| 21.90.71.1 | 358237953 | 0 |
| 21.90.71.2 | 358237954 | 0 |
| 21.90.71.3 | 358237955 | 0 |
| 21.90.71.4 | 358237956 | 0 |
| 21.90.71.5 | 358237957 | 0 |
| 21.90.71.6 | 358237958 | 0 |
| 21.90.71.7 | 358237959 | 0 |
| 21.90.71.8 | 358237960 | 0 |
| 21.90.71.9 | 358237961 | 0 |
| 21.90.71.10 | 358237962 | 0 |
| 21.90.71.11 | 358237963 | 0 |
| 21.90.71.12 | 358237964 | 0 |
| 21.90.71.13 | 358237965 | 0 |
| 21.90.71.14 | 358237966 | 0 |
| 21.90.71.15 | 358237967 | 0 |
| 21.90.71.16 | 358237968 | 0 |
| 21.90.71.17 | 358237969 | 0 |
| 21.90.71.18 | 358237970 | 0 |
| 21.90.71.19 | 358237971 | 0 |
| 21.90.71.20 | 358237972 | 0 |
| 21.90.71.21 | 358237973 | 0 |
| 21.90.71.22 | 358237974 | 0 |
| 21.90.71.23 | 358237975 | 0 |
| 21.90.71.24 | 358237976 | 0 |
| 21.90.71.25 | 358237977 | 0 |
| 21.90.71.26 | 358237978 | 0 |
| 21.90.71.27 | 358237979 | 0 |
| 21.90.71.28 | 358237980 | 0 |
| 21.90.71.29 | 358237981 | 0 |
| 21.90.71.30 | 358237982 | 0 |
| 21.90.71.31 | 358237983 | 0 |
| 21.90.71.32 | 358237984 | 0 |
| 21.90.71.33 | 358237985 | 0 |
| 21.90.71.34 | 358237986 | 0 |
| 21.90.71.35 | 358237987 | 0 |
| 21.90.71.36 | 358237988 | 0 |
| 21.90.71.37 | 358237989 | 0 |
| 21.90.71.38 | 358237990 | 0 |
| 21.90.71.39 | 358237991 | 0 |
| 21.90.71.40 | 358237992 | 0 |
| 21.90.71.41 | 358237993 | 0 |
| 21.90.71.42 | 358237994 | 0 |
| 21.90.71.43 | 358237995 | 0 |
| 21.90.71.44 | 358237996 | 0 |
| 21.90.71.45 | 358237997 | 0 |
| 21.90.71.46 | 358237998 | 0 |
| 21.90.71.47 | 358237999 | 0 |
| 21.90.71.48 | 358238000 | 0 |
| 21.90.71.49 | 358238001 | 0 |
| 21.90.71.50 | 358238002 | 0 |
| 21.90.71.51 | 358238003 | 0 |
| 21.90.71.52 | 358238004 | 0 |
| 21.90.71.53 | 358238005 | 0 |
| 21.90.71.54 | 358238006 | 0 |
| 21.90.71.55 | 358238007 | 0 |
| 21.90.71.56 | 358238008 | 0 |
| 21.90.71.57 | 358238009 | 0 |
| 21.90.71.58 | 358238010 | 0 |
| 21.90.71.59 | 358238011 | 0 |
| 21.90.71.60 | 358238012 | 0 |
| 21.90.71.61 | 358238013 | 0 |
| 21.90.71.62 | 358238014 | 0 |
| 21.90.71.63 | 358238015 | 0 |
| 21.90.71.64 | 358238016 | 0 |
| 21.90.71.65 | 358238017 | 0 |
| 21.90.71.66 | 358238018 | 0 |
| 21.90.71.67 | 358238019 | 0 |
| 21.90.71.68 | 358238020 | 0 |
| 21.90.71.69 | 358238021 | 0 |
| 21.90.71.70 | 358238022 | 0 |
| 21.90.71.71 | 358238023 | 0 |
| 21.90.71.72 | 358238024 | 0 |
| 21.90.71.73 | 358238025 | 0 |
| 21.90.71.74 | 358238026 | 0 |
| 21.90.71.75 | 358238027 | 0 |
| 21.90.71.76 | 358238028 | 0 |
| 21.90.71.77 | 358238029 | 0 |
| 21.90.71.78 | 358238030 | 0 |
| 21.90.71.79 | 358238031 | 0 |
| 21.90.71.80 | 358238032 | 0 |
| 21.90.71.81 | 358238033 | 0 |
| 21.90.71.82 | 358238034 | 0 |
| 21.90.71.83 | 358238035 | 0 |
| 21.90.71.84 | 358238036 | 0 |
| 21.90.71.85 | 358238037 | 0 |