Les adresses IP débutant par 21.240.4 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 | 02/02/2018 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2018-02-02 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2018-02-02 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.240.4.0 | 368051200 | 0 |
| 21.240.4.1 | 368051201 | 0 |
| 21.240.4.2 | 368051202 | 0 |
| 21.240.4.3 | 368051203 | 0 |
| 21.240.4.4 | 368051204 | 0 |
| 21.240.4.5 | 368051205 | 0 |
| 21.240.4.6 | 368051206 | 0 |
| 21.240.4.7 | 368051207 | 0 |
| 21.240.4.8 | 368051208 | 0 |
| 21.240.4.9 | 368051209 | 0 |
| 21.240.4.10 | 368051210 | 0 |
| 21.240.4.11 | 368051211 | 0 |
| 21.240.4.12 | 368051212 | 0 |
| 21.240.4.13 | 368051213 | 0 |
| 21.240.4.14 | 368051214 | 0 |
| 21.240.4.15 | 368051215 | 0 |
| 21.240.4.16 | 368051216 | 0 |
| 21.240.4.17 | 368051217 | 0 |
| 21.240.4.18 | 368051218 | 0 |
| 21.240.4.19 | 368051219 | 0 |
| 21.240.4.20 | 368051220 | 0 |
| 21.240.4.21 | 368051221 | 0 |
| 21.240.4.22 | 368051222 | 0 |
| 21.240.4.23 | 368051223 | 0 |
| 21.240.4.24 | 368051224 | 0 |
| 21.240.4.25 | 368051225 | 0 |
| 21.240.4.26 | 368051226 | 0 |
| 21.240.4.27 | 368051227 | 0 |
| 21.240.4.28 | 368051228 | 0 |
| 21.240.4.29 | 368051229 | 0 |
| 21.240.4.30 | 368051230 | 0 |
| 21.240.4.31 | 368051231 | 0 |
| 21.240.4.32 | 368051232 | 0 |
| 21.240.4.33 | 368051233 | 0 |
| 21.240.4.34 | 368051234 | 0 |
| 21.240.4.35 | 368051235 | 0 |
| 21.240.4.36 | 368051236 | 0 |
| 21.240.4.37 | 368051237 | 0 |
| 21.240.4.38 | 368051238 | 0 |
| 21.240.4.39 | 368051239 | 0 |
| 21.240.4.40 | 368051240 | 0 |
| 21.240.4.41 | 368051241 | 0 |
| 21.240.4.42 | 368051242 | 0 |
| 21.240.4.43 | 368051243 | 0 |
| 21.240.4.44 | 368051244 | 0 |
| 21.240.4.45 | 368051245 | 0 |
| 21.240.4.46 | 368051246 | 0 |
| 21.240.4.47 | 368051247 | 0 |
| 21.240.4.48 | 368051248 | 0 |
| 21.240.4.49 | 368051249 | 0 |
| 21.240.4.50 | 368051250 | 0 |
| 21.240.4.51 | 368051251 | 0 |
| 21.240.4.52 | 368051252 | 0 |
| 21.240.4.53 | 368051253 | 0 |
| 21.240.4.54 | 368051254 | 0 |
| 21.240.4.55 | 368051255 | 0 |
| 21.240.4.56 | 368051256 | 0 |
| 21.240.4.57 | 368051257 | 0 |
| 21.240.4.58 | 368051258 | 0 |
| 21.240.4.59 | 368051259 | 0 |
| 21.240.4.60 | 368051260 | 0 |
| 21.240.4.61 | 368051261 | 0 |
| 21.240.4.62 | 368051262 | 0 |
| 21.240.4.63 | 368051263 | 0 |
| 21.240.4.64 | 368051264 | 0 |
| 21.240.4.65 | 368051265 | 0 |
| 21.240.4.66 | 368051266 | 0 |
| 21.240.4.67 | 368051267 | 0 |
| 21.240.4.68 | 368051268 | 0 |
| 21.240.4.69 | 368051269 | 0 |
| 21.240.4.70 | 368051270 | 0 |
| 21.240.4.71 | 368051271 | 0 |
| 21.240.4.72 | 368051272 | 0 |
| 21.240.4.73 | 368051273 | 0 |
| 21.240.4.74 | 368051274 | 0 |
| 21.240.4.75 | 368051275 | 0 |
| 21.240.4.76 | 368051276 | 0 |
| 21.240.4.77 | 368051277 | 0 |
| 21.240.4.78 | 368051278 | 0 |
| 21.240.4.79 | 368051279 | 0 |
| 21.240.4.80 | 368051280 | 0 |
| 21.240.4.81 | 368051281 | 0 |
| 21.240.4.82 | 368051282 | 0 |
| 21.240.4.83 | 368051283 | 0 |
| 21.240.4.84 | 368051284 | 0 |
| 21.240.4.85 | 368051285 | 0 |