Les adresses IP débutant par 21.91.71 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 | 17/10/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-10-16 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-10-16 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.91.71.0 | 358303488 | 0 |
| 21.91.71.1 | 358303489 | 0 |
| 21.91.71.2 | 358303490 | 0 |
| 21.91.71.3 | 358303491 | 0 |
| 21.91.71.4 | 358303492 | 0 |
| 21.91.71.5 | 358303493 | 0 |
| 21.91.71.6 | 358303494 | 0 |
| 21.91.71.7 | 358303495 | 0 |
| 21.91.71.8 | 358303496 | 0 |
| 21.91.71.9 | 358303497 | 0 |
| 21.91.71.10 | 358303498 | 0 |
| 21.91.71.11 | 358303499 | 0 |
| 21.91.71.12 | 358303500 | 0 |
| 21.91.71.13 | 358303501 | 0 |
| 21.91.71.14 | 358303502 | 0 |
| 21.91.71.15 | 358303503 | 0 |
| 21.91.71.16 | 358303504 | 0 |
| 21.91.71.17 | 358303505 | 0 |
| 21.91.71.18 | 358303506 | 0 |
| 21.91.71.19 | 358303507 | 0 |
| 21.91.71.20 | 358303508 | 0 |
| 21.91.71.21 | 358303509 | 0 |
| 21.91.71.22 | 358303510 | 0 |
| 21.91.71.23 | 358303511 | 0 |
| 21.91.71.24 | 358303512 | 0 |
| 21.91.71.25 | 358303513 | 0 |
| 21.91.71.26 | 358303514 | 0 |
| 21.91.71.27 | 358303515 | 0 |
| 21.91.71.28 | 358303516 | 0 |
| 21.91.71.29 | 358303517 | 0 |
| 21.91.71.30 | 358303518 | 0 |
| 21.91.71.31 | 358303519 | 0 |
| 21.91.71.32 | 358303520 | 0 |
| 21.91.71.33 | 358303521 | 0 |
| 21.91.71.34 | 358303522 | 0 |
| 21.91.71.35 | 358303523 | 0 |
| 21.91.71.36 | 358303524 | 0 |
| 21.91.71.37 | 358303525 | 0 |
| 21.91.71.38 | 358303526 | 0 |
| 21.91.71.39 | 358303527 | 0 |
| 21.91.71.40 | 358303528 | 0 |
| 21.91.71.41 | 358303529 | 0 |
| 21.91.71.42 | 358303530 | 0 |
| 21.91.71.43 | 358303531 | 0 |
| 21.91.71.44 | 358303532 | 0 |
| 21.91.71.45 | 358303533 | 0 |
| 21.91.71.46 | 358303534 | 0 |
| 21.91.71.47 | 358303535 | 0 |
| 21.91.71.48 | 358303536 | 0 |
| 21.91.71.49 | 358303537 | 0 |
| 21.91.71.50 | 358303538 | 0 |
| 21.91.71.51 | 358303539 | 0 |
| 21.91.71.52 | 358303540 | 0 |
| 21.91.71.53 | 358303541 | 0 |
| 21.91.71.54 | 358303542 | 0 |
| 21.91.71.55 | 358303543 | 0 |
| 21.91.71.56 | 358303544 | 0 |
| 21.91.71.57 | 358303545 | 0 |
| 21.91.71.58 | 358303546 | 0 |
| 21.91.71.59 | 358303547 | 0 |
| 21.91.71.60 | 358303548 | 0 |
| 21.91.71.61 | 358303549 | 0 |
| 21.91.71.62 | 358303550 | 0 |
| 21.91.71.63 | 358303551 | 0 |
| 21.91.71.64 | 358303552 | 0 |
| 21.91.71.65 | 358303553 | 0 |
| 21.91.71.66 | 358303554 | 0 |
| 21.91.71.67 | 358303555 | 0 |
| 21.91.71.68 | 358303556 | 0 |
| 21.91.71.69 | 358303557 | 0 |
| 21.91.71.70 | 358303558 | 0 |
| 21.91.71.71 | 358303559 | 0 |
| 21.91.71.72 | 358303560 | 0 |
| 21.91.71.73 | 358303561 | 0 |
| 21.91.71.74 | 358303562 | 0 |
| 21.91.71.75 | 358303563 | 0 |
| 21.91.71.76 | 358303564 | 0 |
| 21.91.71.77 | 358303565 | 0 |
| 21.91.71.78 | 358303566 | 0 |
| 21.91.71.79 | 358303567 | 0 |
| 21.91.71.80 | 358303568 | 0 |
| 21.91.71.81 | 358303569 | 0 |
| 21.91.71.82 | 358303570 | 0 |
| 21.91.71.83 | 358303571 | 0 |
| 21.91.71.84 | 358303572 | 0 |
| 21.91.71.85 | 358303573 | 0 |