L'indirizzo IP 21.90.87 è fornito da China Education and Research Network Center, che è di proprietà del CIDR (Classless Inter-Domain Routing) 22.30.204.0/23, IP tra 22.30.204.0 a 22.30.205.255 ). Il numero di sistema autonomo (ASN) è 4538.
| ASN | 4538 |
| IP inizia con | 22.30.204.0 |
| IP finale con | 22.30.205.255 |
| ASN Nome | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| IP numerico | |
| Registe | |
| Ultimo aggiornamento | 28/09/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Columbus | 39,9664 | -83,0128 | 2017-09-28 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2017-09-28 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.90.87.0 | 358242048 | 0 |
| 21.90.87.1 | 358242049 | 0 |
| 21.90.87.2 | 358242050 | 0 |
| 21.90.87.3 | 358242051 | 0 |
| 21.90.87.4 | 358242052 | 0 |
| 21.90.87.5 | 358242053 | 0 |
| 21.90.87.6 | 358242054 | 0 |
| 21.90.87.7 | 358242055 | 0 |
| 21.90.87.8 | 358242056 | 0 |
| 21.90.87.9 | 358242057 | 0 |
| 21.90.87.10 | 358242058 | 0 |
| 21.90.87.11 | 358242059 | 0 |
| 21.90.87.12 | 358242060 | 0 |
| 21.90.87.13 | 358242061 | 0 |
| 21.90.87.14 | 358242062 | 0 |
| 21.90.87.15 | 358242063 | 0 |
| 21.90.87.16 | 358242064 | 0 |
| 21.90.87.17 | 358242065 | 0 |
| 21.90.87.18 | 358242066 | 0 |
| 21.90.87.19 | 358242067 | 0 |
| 21.90.87.20 | 358242068 | 0 |
| 21.90.87.21 | 358242069 | 0 |
| 21.90.87.22 | 358242070 | 0 |
| 21.90.87.23 | 358242071 | 0 |
| 21.90.87.24 | 358242072 | 0 |
| 21.90.87.25 | 358242073 | 0 |
| 21.90.87.26 | 358242074 | 0 |
| 21.90.87.27 | 358242075 | 0 |
| 21.90.87.28 | 358242076 | 0 |
| 21.90.87.29 | 358242077 | 0 |
| 21.90.87.30 | 358242078 | 0 |
| 21.90.87.31 | 358242079 | 0 |
| 21.90.87.32 | 358242080 | 0 |
| 21.90.87.33 | 358242081 | 0 |
| 21.90.87.34 | 358242082 | 0 |
| 21.90.87.35 | 358242083 | 0 |
| 21.90.87.36 | 358242084 | 0 |
| 21.90.87.37 | 358242085 | 0 |
| 21.90.87.38 | 358242086 | 0 |
| 21.90.87.39 | 358242087 | 0 |
| 21.90.87.40 | 358242088 | 0 |
| 21.90.87.41 | 358242089 | 0 |
| 21.90.87.42 | 358242090 | 0 |
| 21.90.87.43 | 358242091 | 0 |
| 21.90.87.44 | 358242092 | 0 |
| 21.90.87.45 | 358242093 | 0 |
| 21.90.87.46 | 358242094 | 0 |
| 21.90.87.47 | 358242095 | 0 |
| 21.90.87.48 | 358242096 | 0 |
| 21.90.87.49 | 358242097 | 0 |
| 21.90.87.50 | 358242098 | 0 |
| 21.90.87.51 | 358242099 | 0 |
| 21.90.87.52 | 358242100 | 0 |
| 21.90.87.53 | 358242101 | 0 |
| 21.90.87.54 | 358242102 | 0 |
| 21.90.87.55 | 358242103 | 0 |
| 21.90.87.56 | 358242104 | 0 |
| 21.90.87.57 | 358242105 | 0 |
| 21.90.87.58 | 358242106 | 0 |
| 21.90.87.59 | 358242107 | 0 |
| 21.90.87.60 | 358242108 | 0 |
| 21.90.87.61 | 358242109 | 0 |
| 21.90.87.62 | 358242110 | 0 |
| 21.90.87.63 | 358242111 | 0 |
| 21.90.87.64 | 358242112 | 0 |
| 21.90.87.65 | 358242113 | 0 |
| 21.90.87.66 | 358242114 | 0 |
| 21.90.87.67 | 358242115 | 0 |
| 21.90.87.68 | 358242116 | 0 |
| 21.90.87.69 | 358242117 | 0 |
| 21.90.87.70 | 358242118 | 0 |
| 21.90.87.71 | 358242119 | 0 |
| 21.90.87.72 | 358242120 | 0 |
| 21.90.87.73 | 358242121 | 0 |
| 21.90.87.74 | 358242122 | 0 |
| 21.90.87.75 | 358242123 | 0 |
| 21.90.87.76 | 358242124 | 0 |
| 21.90.87.77 | 358242125 | 0 |
| 21.90.87.78 | 358242126 | 0 |
| 21.90.87.79 | 358242127 | 0 |
| 21.90.87.80 | 358242128 | 0 |
| 21.90.87.81 | 358242129 | 0 |
| 21.90.87.82 | 358242130 | 0 |
| 21.90.87.83 | 358242131 | 0 |
| 21.90.87.84 | 358242132 | 0 |
| 21.90.87.85 | 358242133 | 0 |