Les adresses IP débutant par 21.76.89 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 | 10/09/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-09-29 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-09-29 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.76.89.0 | 357325056 | 0 |
| 21.76.89.1 | 357325057 | 0 |
| 21.76.89.2 | 357325058 | 0 |
| 21.76.89.3 | 357325059 | 0 |
| 21.76.89.4 | 357325060 | 0 |
| 21.76.89.5 | 357325061 | 0 |
| 21.76.89.6 | 357325062 | 0 |
| 21.76.89.7 | 357325063 | 0 |
| 21.76.89.8 | 357325064 | 0 |
| 21.76.89.9 | 357325065 | 0 |
| 21.76.89.10 | 357325066 | 0 |
| 21.76.89.11 | 357325067 | 0 |
| 21.76.89.12 | 357325068 | 0 |
| 21.76.89.13 | 357325069 | 0 |
| 21.76.89.14 | 357325070 | 0 |
| 21.76.89.15 | 357325071 | 0 |
| 21.76.89.16 | 357325072 | 0 |
| 21.76.89.17 | 357325073 | 0 |
| 21.76.89.18 | 357325074 | 0 |
| 21.76.89.19 | 357325075 | 0 |
| 21.76.89.20 | 357325076 | 0 |
| 21.76.89.21 | 357325077 | 0 |
| 21.76.89.22 | 357325078 | 0 |
| 21.76.89.23 | 357325079 | 0 |
| 21.76.89.24 | 357325080 | 0 |
| 21.76.89.25 | 357325081 | 0 |
| 21.76.89.26 | 357325082 | 0 |
| 21.76.89.27 | 357325083 | 0 |
| 21.76.89.28 | 357325084 | 0 |
| 21.76.89.29 | 357325085 | 0 |
| 21.76.89.30 | 357325086 | 0 |
| 21.76.89.31 | 357325087 | 0 |
| 21.76.89.32 | 357325088 | 0 |
| 21.76.89.33 | 357325089 | 0 |
| 21.76.89.34 | 357325090 | 0 |
| 21.76.89.35 | 357325091 | 0 |
| 21.76.89.36 | 357325092 | 0 |
| 21.76.89.37 | 357325093 | 0 |
| 21.76.89.38 | 357325094 | 0 |
| 21.76.89.39 | 357325095 | 0 |
| 21.76.89.40 | 357325096 | 0 |
| 21.76.89.41 | 357325097 | 0 |
| 21.76.89.42 | 357325098 | 0 |
| 21.76.89.43 | 357325099 | 0 |
| 21.76.89.44 | 357325100 | 0 |
| 21.76.89.45 | 357325101 | 0 |
| 21.76.89.46 | 357325102 | 0 |
| 21.76.89.47 | 357325103 | 0 |
| 21.76.89.48 | 357325104 | 0 |
| 21.76.89.49 | 357325105 | 0 |
| 21.76.89.50 | 357325106 | 0 |
| 21.76.89.51 | 357325107 | 0 |
| 21.76.89.52 | 357325108 | 0 |
| 21.76.89.53 | 357325109 | 0 |
| 21.76.89.54 | 357325110 | 0 |
| 21.76.89.55 | 357325111 | 0 |
| 21.76.89.56 | 357325112 | 0 |
| 21.76.89.57 | 357325113 | 0 |
| 21.76.89.58 | 357325114 | 0 |
| 21.76.89.59 | 357325115 | 0 |
| 21.76.89.60 | 357325116 | 0 |
| 21.76.89.61 | 357325117 | 0 |
| 21.76.89.62 | 357325118 | 0 |
| 21.76.89.63 | 357325119 | 0 |
| 21.76.89.64 | 357325120 | 0 |
| 21.76.89.65 | 357325121 | 0 |
| 21.76.89.66 | 357325122 | 0 |
| 21.76.89.67 | 357325123 | 0 |
| 21.76.89.68 | 357325124 | 0 |
| 21.76.89.69 | 357325125 | 0 |
| 21.76.89.70 | 357325126 | 0 |
| 21.76.89.71 | 357325127 | 0 |
| 21.76.89.72 | 357325128 | 0 |
| 21.76.89.73 | 357325129 | 0 |
| 21.76.89.74 | 357325130 | 0 |
| 21.76.89.75 | 357325131 | 0 |
| 21.76.89.76 | 357325132 | 0 |
| 21.76.89.77 | 357325133 | 0 |
| 21.76.89.78 | 357325134 | 0 |
| 21.76.89.79 | 357325135 | 0 |
| 21.76.89.80 | 357325136 | 0 |
| 21.76.89.81 | 357325137 | 0 |
| 21.76.89.82 | 357325138 | 0 |
| 21.76.89.83 | 357325139 | 0 |
| 21.76.89.84 | 357325140 | 0 |
| 21.76.89.85 | 357325141 | 0 |