Les adresses IP débutant par 121.83.78 sont fournies par K-Opticom Corporation, elles appartiennent au CIDR (Classless Inter-Domain Routing) 121.80.0.0/14, le bloc IP comprant les adresses de 121.80.0.0 à 121.83.255.255). Le numéro de système autonome (ASN) est 17511.
| ASN | 17511 |
| IP commençant par | 121.80.0.0 |
| IP se terminant par | 121.83.255.255 |
| Nom ASN | K-Opticom Corporation |
| CDIR | 121.80.0.0/14 |
| IP numérique | |
| Registe | apnic |
| Dernière mise à jour | 21/08/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | JP | Japon | - | Osaka | 34,6939 | 135,5022 | 2017-08-21 |
| MaxMind | JP | Japon | - | Osaka | 34,6864 | 135,52 | 2017-08-21 |
| Whois | JP | - | - | - | 138 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.83.78.0 | 2035502592 | 0 |
| 121.83.78.1 | 2035502593 | 0 |
| 121.83.78.2 | 2035502594 | 0 |
| 121.83.78.3 | 2035502595 | 0 |
| 121.83.78.4 | 2035502596 | 0 |
| 121.83.78.5 | 2035502597 | 0 |
| 121.83.78.6 | 2035502598 | 0 |
| 121.83.78.7 | 2035502599 | 0 |
| 121.83.78.8 | 2035502600 | 0 |
| 121.83.78.9 | 2035502601 | 0 |
| 121.83.78.10 | 2035502602 | 0 |
| 121.83.78.11 | 2035502603 | 0 |
| 121.83.78.12 | 2035502604 | 0 |
| 121.83.78.13 | 2035502605 | 0 |
| 121.83.78.14 | 2035502606 | 0 |
| 121.83.78.15 | 2035502607 | 0 |
| 121.83.78.16 | 2035502608 | 0 |
| 121.83.78.17 | 2035502609 | 0 |
| 121.83.78.18 | 2035502610 | 0 |
| 121.83.78.19 | 2035502611 | 0 |
| 121.83.78.20 | 2035502612 | 0 |
| 121.83.78.21 | 2035502613 | 0 |
| 121.83.78.22 | 2035502614 | 0 |
| 121.83.78.23 | 2035502615 | 0 |
| 121.83.78.24 | 2035502616 | 0 |
| 121.83.78.25 | 2035502617 | 0 |
| 121.83.78.26 | 2035502618 | 0 |
| 121.83.78.27 | 2035502619 | 0 |
| 121.83.78.28 | 2035502620 | 0 |
| 121.83.78.29 | 2035502621 | 0 |
| 121.83.78.30 | 2035502622 | 0 |
| 121.83.78.31 | 2035502623 | 0 |
| 121.83.78.32 | 2035502624 | 0 |
| 121.83.78.33 | 2035502625 | 0 |
| 121.83.78.34 | 2035502626 | 0 |
| 121.83.78.35 | 2035502627 | 0 |
| 121.83.78.36 | 2035502628 | 0 |
| 121.83.78.37 | 2035502629 | 0 |
| 121.83.78.38 | 2035502630 | 0 |
| 121.83.78.39 | 2035502631 | 0 |
| 121.83.78.40 | 2035502632 | 0 |
| 121.83.78.41 | 2035502633 | 0 |
| 121.83.78.42 | 2035502634 | 0 |
| 121.83.78.43 | 2035502635 | 0 |
| 121.83.78.44 | 2035502636 | 0 |
| 121.83.78.45 | 2035502637 | 0 |
| 121.83.78.46 | 2035502638 | 0 |
| 121.83.78.47 | 2035502639 | 0 |
| 121.83.78.48 | 2035502640 | 0 |
| 121.83.78.49 | 2035502641 | 0 |
| 121.83.78.50 | 2035502642 | 0 |
| 121.83.78.51 | 2035502643 | 0 |
| 121.83.78.52 | 2035502644 | 0 |
| 121.83.78.53 | 2035502645 | 0 |
| 121.83.78.54 | 2035502646 | 0 |
| 121.83.78.55 | 2035502647 | 0 |
| 121.83.78.56 | 2035502648 | 0 |
| 121.83.78.57 | 2035502649 | 0 |
| 121.83.78.58 | 2035502650 | 0 |
| 121.83.78.59 | 2035502651 | 0 |
| 121.83.78.60 | 2035502652 | 0 |
| 121.83.78.61 | 2035502653 | 0 |
| 121.83.78.62 | 2035502654 | 0 |
| 121.83.78.63 | 2035502655 | 0 |
| 121.83.78.64 | 2035502656 | 0 |
| 121.83.78.65 | 2035502657 | 0 |
| 121.83.78.66 | 2035502658 | 0 |
| 121.83.78.67 | 2035502659 | 0 |
| 121.83.78.68 | 2035502660 | 0 |
| 121.83.78.69 | 2035502661 | 0 |
| 121.83.78.70 | 2035502662 | 0 |
| 121.83.78.71 | 2035502663 | 0 |
| 121.83.78.72 | 2035502664 | 0 |
| 121.83.78.73 | 2035502665 | 0 |
| 121.83.78.74 | 2035502666 | 0 |
| 121.83.78.75 | 2035502667 | 0 |
| 121.83.78.76 | 2035502668 | 0 |
| 121.83.78.77 | 2035502669 | 0 |
| 121.83.78.78 | 2035502670 | 0 |
| 121.83.78.79 | 2035502671 | 0 |
| 121.83.78.80 | 2035502672 | 0 |
| 121.83.78.81 | 2035502673 | 0 |
| 121.83.78.82 | 2035502674 | 0 |
| 121.83.78.83 | 2035502675 | 0 |
| 121.83.78.84 | 2035502676 | 0 |
| 121.83.78.85 | 2035502677 | 0 |