Die IP-Adresse 121.80.21 erfolgt über K-Opticom Corporation, es hat gehören zu den GGDV (Classless Inter-Domain Routing) 121.80.0.0/14 (Bereich 121.80.0.0, 121.83.255.255). Die autonomen Systemnummer (ASN) ist 17511.
| ASN | 17511 |
| Ausgehend von IP | 121.80.0.0 |
| Beendigung durch IP | 121.83.255.255 |
| ASN-Namen | K-Opticom Corporation |
| GGDV | 121.80.0.0/14 |
| Numerische IP | |
| Registrierung | apnic |
| Letztes update | 20.07.2017 |

| Vorwahl des Landes | Land | Region | Stadt | Breitengrad | Länge | Letztes update | |
| IP2Location | JP | Japan | - | Otsu | 35,017 | 135,85 | 2017-07-20 |
| MaxMind | JP | Japan | - | - | 35,1089 | 136,1792 | 2017-07-20 |
| Whois | JP | - | - | - | 138 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.80.21.0 | 2035291392 | 0 |
| 121.80.21.1 | 2035291393 | 0 |
| 121.80.21.2 | 2035291394 | 0 |
| 121.80.21.3 | 2035291395 | 0 |
| 121.80.21.4 | 2035291396 | 0 |
| 121.80.21.5 | 2035291397 | 0 |
| 121.80.21.6 | 2035291398 | 0 |
| 121.80.21.7 | 2035291399 | 0 |
| 121.80.21.8 | 2035291400 | 0 |
| 121.80.21.9 | 2035291401 | 0 |
| 121.80.21.10 | 2035291402 | 0 |
| 121.80.21.11 | 2035291403 | 0 |
| 121.80.21.12 | 2035291404 | 0 |
| 121.80.21.13 | 2035291405 | 0 |
| 121.80.21.14 | 2035291406 | 0 |
| 121.80.21.15 | 2035291407 | 0 |
| 121.80.21.16 | 2035291408 | 0 |
| 121.80.21.17 | 2035291409 | 0 |
| 121.80.21.18 | 2035291410 | 0 |
| 121.80.21.19 | 2035291411 | 0 |
| 121.80.21.20 | 2035291412 | 0 |
| 121.80.21.21 | 2035291413 | 0 |
| 121.80.21.22 | 2035291414 | 0 |
| 121.80.21.23 | 2035291415 | 0 |
| 121.80.21.24 | 2035291416 | 0 |
| 121.80.21.25 | 2035291417 | 0 |
| 121.80.21.26 | 2035291418 | 0 |
| 121.80.21.27 | 2035291419 | 0 |
| 121.80.21.28 | 2035291420 | 0 |
| 121.80.21.29 | 2035291421 | 0 |
| 121.80.21.30 | 2035291422 | 0 |
| 121.80.21.31 | 2035291423 | 0 |
| 121.80.21.32 | 2035291424 | 0 |
| 121.80.21.33 | 2035291425 | 0 |
| 121.80.21.34 | 2035291426 | 0 |
| 121.80.21.35 | 2035291427 | 0 |
| 121.80.21.36 | 2035291428 | 0 |
| 121.80.21.37 | 2035291429 | 0 |
| 121.80.21.38 | 2035291430 | 0 |
| 121.80.21.39 | 2035291431 | 0 |
| 121.80.21.40 | 2035291432 | 0 |
| 121.80.21.41 | 2035291433 | 0 |
| 121.80.21.42 | 2035291434 | 0 |
| 121.80.21.43 | 2035291435 | 0 |
| 121.80.21.44 | 2035291436 | 0 |
| 121.80.21.45 | 2035291437 | 0 |
| 121.80.21.46 | 2035291438 | 0 |
| 121.80.21.47 | 2035291439 | 0 |
| 121.80.21.48 | 2035291440 | 0 |
| 121.80.21.49 | 2035291441 | 0 |
| 121.80.21.50 | 2035291442 | 0 |
| 121.80.21.51 | 2035291443 | 0 |
| 121.80.21.52 | 2035291444 | 0 |
| 121.80.21.53 | 2035291445 | 0 |
| 121.80.21.54 | 2035291446 | 0 |
| 121.80.21.55 | 2035291447 | 0 |
| 121.80.21.56 | 2035291448 | 0 |
| 121.80.21.57 | 2035291449 | 0 |
| 121.80.21.58 | 2035291450 | 0 |
| 121.80.21.59 | 2035291451 | 0 |
| 121.80.21.60 | 2035291452 | 0 |
| 121.80.21.61 | 2035291453 | 0 |
| 121.80.21.62 | 2035291454 | 0 |
| 121.80.21.63 | 2035291455 | 0 |
| 121.80.21.64 | 2035291456 | 0 |
| 121.80.21.65 | 2035291457 | 0 |
| 121.80.21.66 | 2035291458 | 0 |
| 121.80.21.67 | 2035291459 | 0 |
| 121.80.21.68 | 2035291460 | 0 |
| 121.80.21.69 | 2035291461 | 0 |
| 121.80.21.70 | 2035291462 | 0 |
| 121.80.21.71 | 2035291463 | 0 |
| 121.80.21.72 | 2035291464 | 0 |
| 121.80.21.73 | 2035291465 | 0 |
| 121.80.21.74 | 2035291466 | 0 |
| 121.80.21.75 | 2035291467 | 0 |
| 121.80.21.76 | 2035291468 | 0 |
| 121.80.21.77 | 2035291469 | 0 |
| 121.80.21.78 | 2035291470 | 0 |
| 121.80.21.79 | 2035291471 | 0 |
| 121.80.21.80 | 2035291472 | 0 |
| 121.80.21.81 | 2035291473 | 0 |
| 121.80.21.82 | 2035291474 | 0 |
| 121.80.21.83 | 2035291475 | 0 |
| 121.80.21.84 | 2035291476 | 0 |
| 121.80.21.85 | 2035291477 | 0 |