Les adresses IP débutant par 21.80.43 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 | 23/10/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-10-23 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-10-23 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.80.43.0 | 357575424 | 0 |
| 21.80.43.1 | 357575425 | 0 |
| 21.80.43.2 | 357575426 | 0 |
| 21.80.43.3 | 357575427 | 0 |
| 21.80.43.4 | 357575428 | 0 |
| 21.80.43.5 | 357575429 | 0 |
| 21.80.43.6 | 357575430 | 0 |
| 21.80.43.7 | 357575431 | 0 |
| 21.80.43.8 | 357575432 | 0 |
| 21.80.43.9 | 357575433 | 0 |
| 21.80.43.10 | 357575434 | 0 |
| 21.80.43.11 | 357575435 | 0 |
| 21.80.43.12 | 357575436 | 0 |
| 21.80.43.13 | 357575437 | 0 |
| 21.80.43.14 | 357575438 | 0 |
| 21.80.43.15 | 357575439 | 0 |
| 21.80.43.16 | 357575440 | 0 |
| 21.80.43.17 | 357575441 | 0 |
| 21.80.43.18 | 357575442 | 0 |
| 21.80.43.19 | 357575443 | 0 |
| 21.80.43.20 | 357575444 | 0 |
| 21.80.43.21 | 357575445 | 0 |
| 21.80.43.22 | 357575446 | 0 |
| 21.80.43.23 | 357575447 | 0 |
| 21.80.43.24 | 357575448 | 0 |
| 21.80.43.25 | 357575449 | 0 |
| 21.80.43.26 | 357575450 | 0 |
| 21.80.43.27 | 357575451 | 0 |
| 21.80.43.28 | 357575452 | 0 |
| 21.80.43.29 | 357575453 | 0 |
| 21.80.43.30 | 357575454 | 0 |
| 21.80.43.31 | 357575455 | 0 |
| 21.80.43.32 | 357575456 | 0 |
| 21.80.43.33 | 357575457 | 0 |
| 21.80.43.34 | 357575458 | 0 |
| 21.80.43.35 | 357575459 | 0 |
| 21.80.43.36 | 357575460 | 0 |
| 21.80.43.37 | 357575461 | 0 |
| 21.80.43.38 | 357575462 | 0 |
| 21.80.43.39 | 357575463 | 0 |
| 21.80.43.40 | 357575464 | 0 |
| 21.80.43.41 | 357575465 | 0 |
| 21.80.43.42 | 357575466 | 0 |
| 21.80.43.43 | 357575467 | 0 |
| 21.80.43.44 | 357575468 | 0 |
| 21.80.43.45 | 357575469 | 0 |
| 21.80.43.46 | 357575470 | 0 |
| 21.80.43.47 | 357575471 | 0 |
| 21.80.43.48 | 357575472 | 0 |
| 21.80.43.49 | 357575473 | 0 |
| 21.80.43.50 | 357575474 | 0 |
| 21.80.43.51 | 357575475 | 0 |
| 21.80.43.52 | 357575476 | 0 |
| 21.80.43.53 | 357575477 | 0 |
| 21.80.43.54 | 357575478 | 0 |
| 21.80.43.55 | 357575479 | 0 |
| 21.80.43.56 | 357575480 | 0 |
| 21.80.43.57 | 357575481 | 0 |
| 21.80.43.58 | 357575482 | 0 |
| 21.80.43.59 | 357575483 | 0 |
| 21.80.43.60 | 357575484 | 0 |
| 21.80.43.61 | 357575485 | 0 |
| 21.80.43.62 | 357575486 | 0 |
| 21.80.43.63 | 357575487 | 0 |
| 21.80.43.64 | 357575488 | 0 |
| 21.80.43.65 | 357575489 | 0 |
| 21.80.43.66 | 357575490 | 0 |
| 21.80.43.67 | 357575491 | 0 |
| 21.80.43.68 | 357575492 | 0 |
| 21.80.43.69 | 357575493 | 0 |
| 21.80.43.70 | 357575494 | 0 |
| 21.80.43.71 | 357575495 | 0 |
| 21.80.43.72 | 357575496 | 0 |
| 21.80.43.73 | 357575497 | 0 |
| 21.80.43.74 | 357575498 | 0 |
| 21.80.43.75 | 357575499 | 0 |
| 21.80.43.76 | 357575500 | 0 |
| 21.80.43.77 | 357575501 | 0 |
| 21.80.43.78 | 357575502 | 0 |
| 21.80.43.79 | 357575503 | 0 |
| 21.80.43.80 | 357575504 | 0 |
| 21.80.43.81 | 357575505 | 0 |
| 21.80.43.82 | 357575506 | 0 |
| 21.80.43.83 | 357575507 | 0 |
| 21.80.43.84 | 357575508 | 0 |
| 21.80.43.85 | 357575509 | 0 |