L'indirizzo IP 21.90.64 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 | 27/10/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Columbus | 39,9664 | -83,0128 | 2017-10-27 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2017-10-27 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.90.64.0 | 358236160 | 0 |
| 21.90.64.1 | 358236161 | 0 |
| 21.90.64.2 | 358236162 | 0 |
| 21.90.64.3 | 358236163 | 0 |
| 21.90.64.4 | 358236164 | 0 |
| 21.90.64.5 | 358236165 | 0 |
| 21.90.64.6 | 358236166 | 0 |
| 21.90.64.7 | 358236167 | 0 |
| 21.90.64.8 | 358236168 | 0 |
| 21.90.64.9 | 358236169 | 0 |
| 21.90.64.10 | 358236170 | 0 |
| 21.90.64.11 | 358236171 | 0 |
| 21.90.64.12 | 358236172 | 0 |
| 21.90.64.13 | 358236173 | 0 |
| 21.90.64.14 | 358236174 | 0 |
| 21.90.64.15 | 358236175 | 0 |
| 21.90.64.16 | 358236176 | 0 |
| 21.90.64.17 | 358236177 | 0 |
| 21.90.64.18 | 358236178 | 0 |
| 21.90.64.19 | 358236179 | 0 |
| 21.90.64.20 | 358236180 | 0 |
| 21.90.64.21 | 358236181 | 0 |
| 21.90.64.22 | 358236182 | 0 |
| 21.90.64.23 | 358236183 | 0 |
| 21.90.64.24 | 358236184 | 0 |
| 21.90.64.25 | 358236185 | 0 |
| 21.90.64.26 | 358236186 | 0 |
| 21.90.64.27 | 358236187 | 0 |
| 21.90.64.28 | 358236188 | 0 |
| 21.90.64.29 | 358236189 | 0 |
| 21.90.64.30 | 358236190 | 0 |
| 21.90.64.31 | 358236191 | 0 |
| 21.90.64.32 | 358236192 | 0 |
| 21.90.64.33 | 358236193 | 0 |
| 21.90.64.34 | 358236194 | 0 |
| 21.90.64.35 | 358236195 | 0 |
| 21.90.64.36 | 358236196 | 0 |
| 21.90.64.37 | 358236197 | 0 |
| 21.90.64.38 | 358236198 | 0 |
| 21.90.64.39 | 358236199 | 0 |
| 21.90.64.40 | 358236200 | 0 |
| 21.90.64.41 | 358236201 | 0 |
| 21.90.64.42 | 358236202 | 0 |
| 21.90.64.43 | 358236203 | 0 |
| 21.90.64.44 | 358236204 | 0 |
| 21.90.64.45 | 358236205 | 0 |
| 21.90.64.46 | 358236206 | 0 |
| 21.90.64.47 | 358236207 | 0 |
| 21.90.64.48 | 358236208 | 0 |
| 21.90.64.49 | 358236209 | 0 |
| 21.90.64.50 | 358236210 | 0 |
| 21.90.64.51 | 358236211 | 0 |
| 21.90.64.52 | 358236212 | 0 |
| 21.90.64.53 | 358236213 | 0 |
| 21.90.64.54 | 358236214 | 0 |
| 21.90.64.55 | 358236215 | 0 |
| 21.90.64.56 | 358236216 | 0 |
| 21.90.64.57 | 358236217 | 0 |
| 21.90.64.58 | 358236218 | 0 |
| 21.90.64.59 | 358236219 | 0 |
| 21.90.64.60 | 358236220 | 0 |
| 21.90.64.61 | 358236221 | 0 |
| 21.90.64.62 | 358236222 | 0 |
| 21.90.64.63 | 358236223 | 0 |
| 21.90.64.64 | 358236224 | 0 |
| 21.90.64.65 | 358236225 | 0 |
| 21.90.64.66 | 358236226 | 0 |
| 21.90.64.67 | 358236227 | 0 |
| 21.90.64.68 | 358236228 | 0 |
| 21.90.64.69 | 358236229 | 0 |
| 21.90.64.70 | 358236230 | 0 |
| 21.90.64.71 | 358236231 | 0 |
| 21.90.64.72 | 358236232 | 0 |
| 21.90.64.73 | 358236233 | 0 |
| 21.90.64.74 | 358236234 | 0 |
| 21.90.64.75 | 358236235 | 0 |
| 21.90.64.76 | 358236236 | 0 |
| 21.90.64.77 | 358236237 | 0 |
| 21.90.64.78 | 358236238 | 0 |
| 21.90.64.79 | 358236239 | 0 |
| 21.90.64.80 | 358236240 | 0 |
| 21.90.64.81 | 358236241 | 0 |
| 21.90.64.82 | 358236242 | 0 |
| 21.90.64.83 | 358236243 | 0 |
| 21.90.64.84 | 358236244 | 0 |
| 21.90.64.85 | 358236245 | 0 |