L'indirizzo IP 21.99.66 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 | 27/04/2019 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Houston | 29,7633 | -95,3633 | 2019-04-27 |
| MaxMind | US | United States | - | - | 37,751 | -97,822 | 2019-04-27 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.99.66.0 | 358826496 | 0 |
| 21.99.66.1 | 358826497 | 0 |
| 21.99.66.2 | 358826498 | 0 |
| 21.99.66.3 | 358826499 | 0 |
| 21.99.66.4 | 358826500 | 0 |
| 21.99.66.5 | 358826501 | 0 |
| 21.99.66.6 | 358826502 | 0 |
| 21.99.66.7 | 358826503 | 0 |
| 21.99.66.8 | 358826504 | 0 |
| 21.99.66.9 | 358826505 | 0 |
| 21.99.66.10 | 358826506 | 0 |
| 21.99.66.11 | 358826507 | 0 |
| 21.99.66.12 | 358826508 | 0 |
| 21.99.66.13 | 358826509 | 0 |
| 21.99.66.14 | 358826510 | 0 |
| 21.99.66.15 | 358826511 | 0 |
| 21.99.66.16 | 358826512 | 0 |
| 21.99.66.17 | 358826513 | 0 |
| 21.99.66.18 | 358826514 | 0 |
| 21.99.66.19 | 358826515 | 0 |
| 21.99.66.20 | 358826516 | 0 |
| 21.99.66.21 | 358826517 | 0 |
| 21.99.66.22 | 358826518 | 0 |
| 21.99.66.23 | 358826519 | 0 |
| 21.99.66.24 | 358826520 | 0 |
| 21.99.66.25 | 358826521 | 0 |
| 21.99.66.26 | 358826522 | 0 |
| 21.99.66.27 | 358826523 | 0 |
| 21.99.66.28 | 358826524 | 0 |
| 21.99.66.29 | 358826525 | 0 |
| 21.99.66.30 | 358826526 | 0 |
| 21.99.66.31 | 358826527 | 0 |
| 21.99.66.32 | 358826528 | 0 |
| 21.99.66.33 | 358826529 | 0 |
| 21.99.66.34 | 358826530 | 0 |
| 21.99.66.35 | 358826531 | 0 |
| 21.99.66.36 | 358826532 | 0 |
| 21.99.66.37 | 358826533 | 0 |
| 21.99.66.38 | 358826534 | 0 |
| 21.99.66.39 | 358826535 | 0 |
| 21.99.66.40 | 358826536 | 0 |
| 21.99.66.41 | 358826537 | 0 |
| 21.99.66.42 | 358826538 | 0 |
| 21.99.66.43 | 358826539 | 0 |
| 21.99.66.44 | 358826540 | 0 |
| 21.99.66.45 | 358826541 | 0 |
| 21.99.66.46 | 358826542 | 0 |
| 21.99.66.47 | 358826543 | 0 |
| 21.99.66.48 | 358826544 | 0 |
| 21.99.66.49 | 358826545 | 0 |
| 21.99.66.50 | 358826546 | 0 |
| 21.99.66.51 | 358826547 | 0 |
| 21.99.66.52 | 358826548 | 0 |
| 21.99.66.53 | 358826549 | 0 |
| 21.99.66.54 | 358826550 | 0 |
| 21.99.66.55 | 358826551 | 0 |
| 21.99.66.56 | 358826552 | 0 |
| 21.99.66.57 | 358826553 | 0 |
| 21.99.66.58 | 358826554 | 0 |
| 21.99.66.59 | 358826555 | 0 |
| 21.99.66.60 | 358826556 | 0 |
| 21.99.66.61 | 358826557 | 0 |
| 21.99.66.62 | 358826558 | 0 |
| 21.99.66.63 | 358826559 | 0 |
| 21.99.66.64 | 358826560 | 0 |
| 21.99.66.65 | 358826561 | 0 |
| 21.99.66.66 | 358826562 | 0 |
| 21.99.66.67 | 358826563 | 0 |
| 21.99.66.68 | 358826564 | 0 |
| 21.99.66.69 | 358826565 | 0 |
| 21.99.66.70 | 358826566 | 0 |
| 21.99.66.71 | 358826567 | 0 |
| 21.99.66.72 | 358826568 | 0 |
| 21.99.66.73 | 358826569 | 0 |
| 21.99.66.74 | 358826570 | 0 |
| 21.99.66.75 | 358826571 | 0 |
| 21.99.66.76 | 358826572 | 0 |
| 21.99.66.77 | 358826573 | 0 |
| 21.99.66.78 | 358826574 | 0 |
| 21.99.66.79 | 358826575 | 0 |
| 21.99.66.80 | 358826576 | 0 |
| 21.99.66.81 | 358826577 | 0 |
| 21.99.66.82 | 358826578 | 0 |
| 21.99.66.83 | 358826579 | 0 |
| 21.99.66.84 | 358826580 | 0 |
| 21.99.66.85 | 358826581 | 0 |