L'indirizzo IP 121.81.4 è fornito da K-Opticom Corporation, che è di proprietà del CIDR (Classless Inter-Domain Routing) 121.80.0.0/14, IP tra 121.80.0.0 a 121.83.255.255 ). Il numero di sistema autonomo (ASN) è 17511.
| ASN | 17511 |
| IP inizia con | 121.80.0.0 |
| IP finale con | 121.83.255.255 |
| ASN Nome | K-Opticom Corporation |
| CDIR | 121.80.0.0/14 |
| IP numerico | |
| Registe | apnic |
| Ultimo aggiornamento | 07/07/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | JP | Japan | - | Wakayama | 34,233 | 135,167 | 2017-07-06 |
| MaxMind | JP | Japan | - | Kyoto | 35,0214 | 135,7556 | 2017-07-06 |
| Whois | JP | - | - | - | 138 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.81.4.0 | 2035352576 | 0 |
| 121.81.4.1 | 2035352577 | 0 |
| 121.81.4.2 | 2035352578 | 0 |
| 121.81.4.3 | 2035352579 | 0 |
| 121.81.4.4 | 2035352580 | 0 |
| 121.81.4.5 | 2035352581 | 0 |
| 121.81.4.6 | 2035352582 | 0 |
| 121.81.4.7 | 2035352583 | 0 |
| 121.81.4.8 | 2035352584 | 0 |
| 121.81.4.9 | 2035352585 | 0 |
| 121.81.4.10 | 2035352586 | 0 |
| 121.81.4.11 | 2035352587 | 0 |
| 121.81.4.12 | 2035352588 | 0 |
| 121.81.4.13 | 2035352589 | 0 |
| 121.81.4.14 | 2035352590 | 0 |
| 121.81.4.15 | 2035352591 | 0 |
| 121.81.4.16 | 2035352592 | 0 |
| 121.81.4.17 | 2035352593 | 0 |
| 121.81.4.18 | 2035352594 | 0 |
| 121.81.4.19 | 2035352595 | 0 |
| 121.81.4.20 | 2035352596 | 0 |
| 121.81.4.21 | 2035352597 | 0 |
| 121.81.4.22 | 2035352598 | 0 |
| 121.81.4.23 | 2035352599 | 0 |
| 121.81.4.24 | 2035352600 | 0 |
| 121.81.4.25 | 2035352601 | 0 |
| 121.81.4.26 | 2035352602 | 0 |
| 121.81.4.27 | 2035352603 | 0 |
| 121.81.4.28 | 2035352604 | 0 |
| 121.81.4.29 | 2035352605 | 0 |
| 121.81.4.30 | 2035352606 | 0 |
| 121.81.4.31 | 2035352607 | 0 |
| 121.81.4.32 | 2035352608 | 0 |
| 121.81.4.33 | 2035352609 | 0 |
| 121.81.4.34 | 2035352610 | 0 |
| 121.81.4.35 | 2035352611 | 0 |
| 121.81.4.36 | 2035352612 | 0 |
| 121.81.4.37 | 2035352613 | 0 |
| 121.81.4.38 | 2035352614 | 0 |
| 121.81.4.39 | 2035352615 | 0 |
| 121.81.4.40 | 2035352616 | 0 |
| 121.81.4.41 | 2035352617 | 0 |
| 121.81.4.42 | 2035352618 | 0 |
| 121.81.4.43 | 2035352619 | 0 |
| 121.81.4.44 | 2035352620 | 0 |
| 121.81.4.45 | 2035352621 | 0 |
| 121.81.4.46 | 2035352622 | 0 |
| 121.81.4.47 | 2035352623 | 0 |
| 121.81.4.48 | 2035352624 | 0 |
| 121.81.4.49 | 2035352625 | 0 |
| 121.81.4.50 | 2035352626 | 0 |
| 121.81.4.51 | 2035352627 | 0 |
| 121.81.4.52 | 2035352628 | 0 |
| 121.81.4.53 | 2035352629 | 0 |
| 121.81.4.54 | 2035352630 | 0 |
| 121.81.4.55 | 2035352631 | 0 |
| 121.81.4.56 | 2035352632 | 0 |
| 121.81.4.57 | 2035352633 | 0 |
| 121.81.4.58 | 2035352634 | 0 |
| 121.81.4.59 | 2035352635 | 0 |
| 121.81.4.60 | 2035352636 | 0 |
| 121.81.4.61 | 2035352637 | 0 |
| 121.81.4.62 | 2035352638 | 0 |
| 121.81.4.63 | 2035352639 | 0 |
| 121.81.4.64 | 2035352640 | 0 |
| 121.81.4.65 | 2035352641 | 0 |
| 121.81.4.66 | 2035352642 | 0 |
| 121.81.4.67 | 2035352643 | 0 |
| 121.81.4.68 | 2035352644 | 0 |
| 121.81.4.69 | 2035352645 | 0 |
| 121.81.4.70 | 2035352646 | 0 |
| 121.81.4.71 | 2035352647 | 0 |
| 121.81.4.72 | 2035352648 | 0 |
| 121.81.4.73 | 2035352649 | 0 |
| 121.81.4.74 | 2035352650 | 0 |
| 121.81.4.75 | 2035352651 | 0 |
| 121.81.4.76 | 2035352652 | 0 |
| 121.81.4.77 | 2035352653 | 0 |
| 121.81.4.78 | 2035352654 | 0 |
| 121.81.4.79 | 2035352655 | 0 |
| 121.81.4.80 | 2035352656 | 0 |
| 121.81.4.81 | 2035352657 | 0 |
| 121.81.4.82 | 2035352658 | 0 |
| 121.81.4.83 | 2035352659 | 0 |
| 121.81.4.84 | 2035352660 | 0 |
| 121.81.4.85 | 2035352661 | 0 |
| IP | Numerical IP | DNS |
| 121.81.4.86 | 2035352662 | 0 |
| 121.81.4.87 | 2035352663 | 0 |
| 121.81.4.88 | 2035352664 | 0 |
| 121.81.4.89 | 2035352665 | 0 |
| 121.81.4.90 | 2035352666 | 0 |
| 121.81.4.91 | 2035352667 | 0 |
| 121.81.4.92 | 2035352668 | 0 |
| 121.81.4.93 | 2035352669 | 0 |
| 121.81.4.94 | 2035352670 | 0 |
| 121.81.4.95 | 2035352671 | 0 |
| 121.81.4.96 | 2035352672 | 0 |
| 121.81.4.97 | 2035352673 | 0 |
| 121.81.4.98 | 2035352674 | 0 |
| 121.81.4.99 | 2035352675 | 0 |
| 121.81.4.100 | 2035352676 | 0 |
| 121.81.4.101 | 2035352677 | 0 |
| 121.81.4.102 | 2035352678 | 0 |
| 121.81.4.103 | 2035352679 | 0 |
| 121.81.4.104 | 2035352680 | 0 |
| 121.81.4.105 | 2035352681 | 0 |
| 121.81.4.106 | 2035352682 | 0 |
| 121.81.4.107 | 2035352683 | 0 |
| 121.81.4.108 | 2035352684 | 0 |
| 121.81.4.109 | 2035352685 | 0 |
| 121.81.4.110 | 2035352686 | 0 |
| 121.81.4.111 | 2035352687 | 0 |
| 121.81.4.112 | 2035352688 | 0 |
| 121.81.4.113 | 2035352689 | 0 |
| 121.81.4.114 | 2035352690 | 0 |
| 121.81.4.115 | 2035352691 | 0 |
| 121.81.4.116 | 2035352692 | 0 |
| 121.81.4.117 | 2035352693 | 0 |
| 121.81.4.118 | 2035352694 | 0 |
| 121.81.4.119 | 2035352695 | 0 |
| 121.81.4.120 | 2035352696 | 0 |
| 121.81.4.121 | 2035352697 | 0 |
| 121.81.4.122 | 2035352698 | 0 |
| 121.81.4.123 | 2035352699 | 0 |
| 121.81.4.124 | 2035352700 | 0 |
| 121.81.4.125 | 2035352701 | 0 |
| 121.81.4.126 | 2035352702 | 0 |
| 121.81.4.127 | 2035352703 | 0 |
| 121.81.4.128 | 2035352704 | 0 |
| 121.81.4.129 | 2035352705 | 0 |
| 121.81.4.130 | 2035352706 | 0 |
| 121.81.4.131 | 2035352707 | 0 |
| 121.81.4.132 | 2035352708 | 0 |
| 121.81.4.133 | 2035352709 | 0 |
| 121.81.4.134 | 2035352710 | 0 |
| 121.81.4.135 | 2035352711 | 0 |
| 121.81.4.136 | 2035352712 | 0 |
| 121.81.4.137 | 2035352713 | 0 |
| 121.81.4.138 | 2035352714 | 0 |
| 121.81.4.139 | 2035352715 | 0 |
| 121.81.4.140 | 2035352716 | 0 |
| 121.81.4.141 | 2035352717 | 0 |
| 121.81.4.142 | 2035352718 | 0 |
| 121.81.4.143 | 2035352719 | 0 |
| 121.81.4.144 | 2035352720 | 0 |
| 121.81.4.145 | 2035352721 | 0 |
| 121.81.4.146 | 2035352722 | 0 |
| 121.81.4.147 | 2035352723 | 0 |
| 121.81.4.148 | 2035352724 | 0 |
| 121.81.4.149 | 2035352725 | 0 |
| 121.81.4.150 | 2035352726 | 0 |
| 121.81.4.151 | 2035352727 | 0 |
| 121.81.4.152 | 2035352728 | 0 |
| 121.81.4.153 | 2035352729 | 0 |
| 121.81.4.154 | 2035352730 | 0 |
| 121.81.4.155 | 2035352731 | 0 |
| 121.81.4.156 | 2035352732 | 0 |
| 121.81.4.157 | 2035352733 | 0 |
| 121.81.4.158 | 2035352734 | 0 |
| 121.81.4.159 | 2035352735 | 0 |
| 121.81.4.160 | 2035352736 | 0 |
| 121.81.4.161 | 2035352737 | 0 |
| 121.81.4.162 | 2035352738 | 0 |
| 121.81.4.163 | 2035352739 | 0 |
| 121.81.4.164 | 2035352740 | 0 |
| 121.81.4.165 | 2035352741 | 0 |
| 121.81.4.166 | 2035352742 | 0 |
| 121.81.4.167 | 2035352743 | 0 |
| 121.81.4.168 | 2035352744 | 0 |
| 121.81.4.169 | 2035352745 | 0 |
| 121.81.4.170 | 2035352746 | 0 |
| 121.81.4.171 | 2035352747 | 0 |
| IP | Numerical IP | DNS |
| 121.81.4.172 | 2035352748 | 0 |
| 121.81.4.173 | 2035352749 | 0 |
| 121.81.4.174 | 2035352750 | 0 |
| 121.81.4.175 | 2035352751 | 0 |
| 121.81.4.176 | 2035352752 | 0 |
| 121.81.4.177 | 2035352753 | 0 |
| 121.81.4.178 | 2035352754 | 0 |
| 121.81.4.179 | 2035352755 | 0 |
| 121.81.4.180 | 2035352756 | 0 |
| 121.81.4.181 | 2035352757 | 0 |
| 121.81.4.182 | 2035352758 | 0 |
| 121.81.4.183 | 2035352759 | 0 |
| 121.81.4.184 | 2035352760 | 0 |
| 121.81.4.185 | 2035352761 | 0 |
| 121.81.4.186 | 2035352762 | 0 |
| 121.81.4.187 | 2035352763 | 0 |
| 121.81.4.188 | 2035352764 | 0 |
| 121.81.4.189 | 2035352765 | 0 |
| 121.81.4.190 | 2035352766 | 0 |
| 121.81.4.191 | 2035352767 | 0 |
| 121.81.4.192 | 2035352768 | 0 |
| 121.81.4.193 | 2035352769 | 0 |
| 121.81.4.194 | 2035352770 | 0 |
| 121.81.4.195 | 2035352771 | 0 |
| 121.81.4.196 | 2035352772 | 0 |
| 121.81.4.197 | 2035352773 | 0 |
| 121.81.4.198 | 2035352774 | 0 |
| 121.81.4.199 | 2035352775 | 0 |
| 121.81.4.200 | 2035352776 | 0 |
| 121.81.4.201 | 2035352777 | 0 |
| 121.81.4.202 | 2035352778 | 0 |
| 121.81.4.203 | 2035352779 | 0 |
| 121.81.4.204 | 2035352780 | 0 |
| 121.81.4.205 | 2035352781 | 0 |
| 121.81.4.206 | 2035352782 | 0 |
| 121.81.4.207 | 2035352783 | 0 |
| 121.81.4.208 | 2035352784 | 0 |
| 121.81.4.209 | 2035352785 | 0 |
| 121.81.4.210 | 2035352786 | 0 |
| 121.81.4.211 | 2035352787 | 0 |
| 121.81.4.212 | 2035352788 | 0 |
| 121.81.4.213 | 2035352789 | 0 |
| 121.81.4.214 | 2035352790 | 0 |
| 121.81.4.215 | 2035352791 | 0 |
| 121.81.4.216 | 2035352792 | 0 |
| 121.81.4.217 | 2035352793 | 0 |
| 121.81.4.218 | 2035352794 | 0 |
| 121.81.4.219 | 2035352795 | 0 |
| 121.81.4.220 | 2035352796 | 0 |
| 121.81.4.221 | 2035352797 | 0 |
| 121.81.4.222 | 2035352798 | 0 |
| 121.81.4.223 | 2035352799 | 0 |
| 121.81.4.224 | 2035352800 | 0 |
| 121.81.4.225 | 2035352801 | 0 |
| 121.81.4.226 | 2035352802 | 0 |
| 121.81.4.227 | 2035352803 | 0 |
| 121.81.4.228 | 2035352804 | 0 |
| 121.81.4.229 | 2035352805 | 0 |
| 121.81.4.230 | 2035352806 | 0 |
| 121.81.4.231 | 2035352807 | 0 |
| 121.81.4.232 | 2035352808 | 0 |
| 121.81.4.233 | 2035352809 | 0 |
| 121.81.4.234 | 2035352810 | 0 |
| 121.81.4.235 | 2035352811 | 0 |
| 121.81.4.236 | 2035352812 | 0 |
| 121.81.4.237 | 2035352813 | 0 |
| 121.81.4.238 | 2035352814 | 0 |
| 121.81.4.239 | 2035352815 | 0 |
| 121.81.4.240 | 2035352816 | 0 |
| 121.81.4.241 | 2035352817 | 0 |
| 121.81.4.242 | 2035352818 | 0 |
| 121.81.4.243 | 2035352819 | 0 |
| 121.81.4.244 | 2035352820 | 0 |
| 121.81.4.245 | 2035352821 | 0 |
| 121.81.4.246 | 2035352822 | 0 |
| 121.81.4.247 | 2035352823 | 0 |
| 121.81.4.248 | 2035352824 | 0 |
| 121.81.4.249 | 2035352825 | 0 |
| 121.81.4.250 | 2035352826 | 0 |
| 121.81.4.251 | 2035352827 | 0 |
| 121.81.4.252 | 2035352828 | 0 |
| 121.81.4.253 | 2035352829 | 0 |
| 121.81.4.254 | 2035352830 | 0 |
| 121.81.4.255 | 2035352831 | 0 |