Les adresses IP débutant par 121.5.128 sont fournies par China Networks Inter-Exchange, elles appartiennent au CIDR (Classless Inter-Domain Routing) 121.5.0.0/16, le bloc IP comprant les adresses de 121.5.0.0 à 121.5.255.255). Le numéro de système autonome (ASN) est 4847.
| ASN | 4847 |
| IP commençant par | 121.5.0.0 |
| IP se terminant par | 121.5.255.255 |
| Nom ASN | China Networks Inter-Exchange |
| CDIR | 121.5.0.0/16 |
| IP numérique | |
| Registe | apnic |
| Dernière mise à jour | 16/08/2018 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | CN | Chine | - | Changchun | 43,88 | 125,3228 | 2018-08-16 |
| MaxMind | SG | Singapour | - | Singapore | 1,2855 | 103,8565 | 2018-08-16 |
| Whois | CN | - | - | - | 104 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.5.128.0 | 2030403584 | 0 |
| 121.5.128.1 | 2030403585 | 0 |
| 121.5.128.2 | 2030403586 | 0 |
| 121.5.128.3 | 2030403587 | 0 |
| 121.5.128.4 | 2030403588 | 0 |
| 121.5.128.5 | 2030403589 | 0 |
| 121.5.128.6 | 2030403590 | 0 |
| 121.5.128.7 | 2030403591 | 0 |
| 121.5.128.8 | 2030403592 | 0 |
| 121.5.128.9 | 2030403593 | 0 |
| 121.5.128.10 | 2030403594 | 0 |
| 121.5.128.11 | 2030403595 | 0 |
| 121.5.128.12 | 2030403596 | 0 |
| 121.5.128.13 | 2030403597 | 0 |
| 121.5.128.14 | 2030403598 | 0 |
| 121.5.128.15 | 2030403599 | 0 |
| 121.5.128.16 | 2030403600 | 0 |
| 121.5.128.17 | 2030403601 | 0 |
| 121.5.128.18 | 2030403602 | 0 |
| 121.5.128.19 | 2030403603 | 0 |
| 121.5.128.20 | 2030403604 | 0 |
| 121.5.128.21 | 2030403605 | 0 |
| 121.5.128.22 | 2030403606 | 0 |
| 121.5.128.23 | 2030403607 | 0 |
| 121.5.128.24 | 2030403608 | 0 |
| 121.5.128.25 | 2030403609 | 0 |
| 121.5.128.26 | 2030403610 | 0 |
| 121.5.128.27 | 2030403611 | 0 |
| 121.5.128.28 | 2030403612 | 0 |
| 121.5.128.29 | 2030403613 | 0 |
| 121.5.128.30 | 2030403614 | 0 |
| 121.5.128.31 | 2030403615 | 0 |
| 121.5.128.32 | 2030403616 | 0 |
| 121.5.128.33 | 2030403617 | 0 |
| 121.5.128.34 | 2030403618 | 0 |
| 121.5.128.35 | 2030403619 | 0 |
| 121.5.128.36 | 2030403620 | 0 |
| 121.5.128.37 | 2030403621 | 0 |
| 121.5.128.38 | 2030403622 | 0 |
| 121.5.128.39 | 2030403623 | 0 |
| 121.5.128.40 | 2030403624 | 0 |
| 121.5.128.41 | 2030403625 | 0 |
| 121.5.128.42 | 2030403626 | 0 |
| 121.5.128.43 | 2030403627 | 0 |
| 121.5.128.44 | 2030403628 | 0 |
| 121.5.128.45 | 2030403629 | 0 |
| 121.5.128.46 | 2030403630 | 0 |
| 121.5.128.47 | 2030403631 | 0 |
| 121.5.128.48 | 2030403632 | 0 |
| 121.5.128.49 | 2030403633 | 0 |
| 121.5.128.50 | 2030403634 | 0 |
| 121.5.128.51 | 2030403635 | 0 |
| 121.5.128.52 | 2030403636 | 0 |
| 121.5.128.53 | 2030403637 | 0 |
| 121.5.128.54 | 2030403638 | 0 |
| 121.5.128.55 | 2030403639 | 0 |
| 121.5.128.56 | 2030403640 | 0 |
| 121.5.128.57 | 2030403641 | 0 |
| 121.5.128.58 | 2030403642 | 0 |
| 121.5.128.59 | 2030403643 | 0 |
| 121.5.128.60 | 2030403644 | 0 |
| 121.5.128.61 | 2030403645 | 0 |
| 121.5.128.62 | 2030403646 | 0 |
| 121.5.128.63 | 2030403647 | 0 |
| 121.5.128.64 | 2030403648 | 0 |
| 121.5.128.65 | 2030403649 | 0 |
| 121.5.128.66 | 2030403650 | 0 |
| 121.5.128.67 | 2030403651 | 0 |
| 121.5.128.68 | 2030403652 | 0 |
| 121.5.128.69 | 2030403653 | 0 |
| 121.5.128.70 | 2030403654 | 0 |
| 121.5.128.71 | 2030403655 | 0 |
| 121.5.128.72 | 2030403656 | 0 |
| 121.5.128.73 | 2030403657 | 0 |
| 121.5.128.74 | 2030403658 | 0 |
| 121.5.128.75 | 2030403659 | 0 |
| 121.5.128.76 | 2030403660 | 0 |
| 121.5.128.77 | 2030403661 | 0 |
| 121.5.128.78 | 2030403662 | 0 |
| 121.5.128.79 | 2030403663 | 0 |
| 121.5.128.80 | 2030403664 | 0 |
| 121.5.128.81 | 2030403665 | 0 |
| 121.5.128.82 | 2030403666 | 0 |
| 121.5.128.83 | 2030403667 | 0 |
| 121.5.128.84 | 2030403668 | 0 |
| 121.5.128.85 | 2030403669 | 0 |