L'indirizzo IP 21.87.78 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 | 20/10/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Columbus | 39,9664 | -83,0128 | 2017-10-20 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2017-10-20 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.87.78.0 | 358043136 | 0 |
| 21.87.78.1 | 358043137 | 0 |
| 21.87.78.2 | 358043138 | 0 |
| 21.87.78.3 | 358043139 | 0 |
| 21.87.78.4 | 358043140 | 0 |
| 21.87.78.5 | 358043141 | 0 |
| 21.87.78.6 | 358043142 | 0 |
| 21.87.78.7 | 358043143 | 0 |
| 21.87.78.8 | 358043144 | 0 |
| 21.87.78.9 | 358043145 | 0 |
| 21.87.78.10 | 358043146 | 0 |
| 21.87.78.11 | 358043147 | 0 |
| 21.87.78.12 | 358043148 | 0 |
| 21.87.78.13 | 358043149 | 0 |
| 21.87.78.14 | 358043150 | 0 |
| 21.87.78.15 | 358043151 | 0 |
| 21.87.78.16 | 358043152 | 0 |
| 21.87.78.17 | 358043153 | 0 |
| 21.87.78.18 | 358043154 | 0 |
| 21.87.78.19 | 358043155 | 0 |
| 21.87.78.20 | 358043156 | 0 |
| 21.87.78.21 | 358043157 | 0 |
| 21.87.78.22 | 358043158 | 0 |
| 21.87.78.23 | 358043159 | 0 |
| 21.87.78.24 | 358043160 | 0 |
| 21.87.78.25 | 358043161 | 0 |
| 21.87.78.26 | 358043162 | 0 |
| 21.87.78.27 | 358043163 | 0 |
| 21.87.78.28 | 358043164 | 0 |
| 21.87.78.29 | 358043165 | 0 |
| 21.87.78.30 | 358043166 | 0 |
| 21.87.78.31 | 358043167 | 0 |
| 21.87.78.32 | 358043168 | 0 |
| 21.87.78.33 | 358043169 | 0 |
| 21.87.78.34 | 358043170 | 0 |
| 21.87.78.35 | 358043171 | 0 |
| 21.87.78.36 | 358043172 | 0 |
| 21.87.78.37 | 358043173 | 0 |
| 21.87.78.38 | 358043174 | 0 |
| 21.87.78.39 | 358043175 | 0 |
| 21.87.78.40 | 358043176 | 0 |
| 21.87.78.41 | 358043177 | 0 |
| 21.87.78.42 | 358043178 | 0 |
| 21.87.78.43 | 358043179 | 0 |
| 21.87.78.44 | 358043180 | 0 |
| 21.87.78.45 | 358043181 | 0 |
| 21.87.78.46 | 358043182 | 0 |
| 21.87.78.47 | 358043183 | 0 |
| 21.87.78.48 | 358043184 | 0 |
| 21.87.78.49 | 358043185 | 0 |
| 21.87.78.50 | 358043186 | 0 |
| 21.87.78.51 | 358043187 | 0 |
| 21.87.78.52 | 358043188 | 0 |
| 21.87.78.53 | 358043189 | 0 |
| 21.87.78.54 | 358043190 | 0 |
| 21.87.78.55 | 358043191 | 0 |
| 21.87.78.56 | 358043192 | 0 |
| 21.87.78.57 | 358043193 | 0 |
| 21.87.78.58 | 358043194 | 0 |
| 21.87.78.59 | 358043195 | 0 |
| 21.87.78.60 | 358043196 | 0 |
| 21.87.78.61 | 358043197 | 0 |
| 21.87.78.62 | 358043198 | 0 |
| 21.87.78.63 | 358043199 | 0 |
| 21.87.78.64 | 358043200 | 0 |
| 21.87.78.65 | 358043201 | 0 |
| 21.87.78.66 | 358043202 | 0 |
| 21.87.78.67 | 358043203 | 0 |
| 21.87.78.68 | 358043204 | 0 |
| 21.87.78.69 | 358043205 | 0 |
| 21.87.78.70 | 358043206 | 0 |
| 21.87.78.71 | 358043207 | 0 |
| 21.87.78.72 | 358043208 | 0 |
| 21.87.78.73 | 358043209 | 0 |
| 21.87.78.74 | 358043210 | 0 |
| 21.87.78.75 | 358043211 | 0 |
| 21.87.78.76 | 358043212 | 0 |
| 21.87.78.77 | 358043213 | 0 |
| 21.87.78.78 | 358043214 | 0 |
| 21.87.78.79 | 358043215 | 0 |
| 21.87.78.80 | 358043216 | 0 |
| 21.87.78.81 | 358043217 | 0 |
| 21.87.78.82 | 358043218 | 0 |
| 21.87.78.83 | 358043219 | 0 |
| 21.87.78.84 | 358043220 | 0 |
| 21.87.78.85 | 358043221 | 0 |