Les adresses IP débutant par 121.158.3 sont fournies par Korea Telecom, elles appartiennent au CIDR (Classless Inter-Domain Routing) 121.128.0.0/11, le bloc IP comprant les adresses de 121.128.0.0 à 121.159.255.255). Le numéro de système autonome (ASN) est 4766.
| ASN | 4766 |
| IP commençant par | 121.128.0.0 |
| IP se terminant par | 121.159.255.255 |
| Nom ASN | Korea Telecom |
| CDIR | 121.128.0.0/11 |
| IP numérique | |
| Registe | apnic |
| Dernière mise à jour | 06/01/2018 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | KR | Korea, Republic of | - | Seoul | 37,5683 | 126,9778 | 2018-01-06 |
| MaxMind | KR | Corée du Sud | - | Seoul | 37,5111 | 126,9743 | 2018-01-06 |
| Whois | KR | - | - | - | 128 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.158.3.0 | 2040398592 | 0 |
| 121.158.3.1 | 2040398593 | 0 |
| 121.158.3.2 | 2040398594 | 0 |
| 121.158.3.3 | 2040398595 | 0 |
| 121.158.3.4 | 2040398596 | 0 |
| 121.158.3.5 | 2040398597 | 0 |
| 121.158.3.6 | 2040398598 | 0 |
| 121.158.3.7 | 2040398599 | 0 |
| 121.158.3.8 | 2040398600 | 0 |
| 121.158.3.9 | 2040398601 | 0 |
| 121.158.3.10 | 2040398602 | 0 |
| 121.158.3.11 | 2040398603 | 0 |
| 121.158.3.12 | 2040398604 | 0 |
| 121.158.3.13 | 2040398605 | 0 |
| 121.158.3.14 | 2040398606 | 0 |
| 121.158.3.15 | 2040398607 | 0 |
| 121.158.3.16 | 2040398608 | 0 |
| 121.158.3.17 | 2040398609 | 0 |
| 121.158.3.18 | 2040398610 | 0 |
| 121.158.3.19 | 2040398611 | 0 |
| 121.158.3.20 | 2040398612 | 0 |
| 121.158.3.21 | 2040398613 | 0 |
| 121.158.3.22 | 2040398614 | 0 |
| 121.158.3.23 | 2040398615 | 0 |
| 121.158.3.24 | 2040398616 | 0 |
| 121.158.3.25 | 2040398617 | 0 |
| 121.158.3.26 | 2040398618 | 0 |
| 121.158.3.27 | 2040398619 | 0 |
| 121.158.3.28 | 2040398620 | 0 |
| 121.158.3.29 | 2040398621 | 0 |
| 121.158.3.30 | 2040398622 | 0 |
| 121.158.3.31 | 2040398623 | 0 |
| 121.158.3.32 | 2040398624 | 0 |
| 121.158.3.33 | 2040398625 | 0 |
| 121.158.3.34 | 2040398626 | 0 |
| 121.158.3.35 | 2040398627 | 0 |
| 121.158.3.36 | 2040398628 | 0 |
| 121.158.3.37 | 2040398629 | 0 |
| 121.158.3.38 | 2040398630 | 0 |
| 121.158.3.39 | 2040398631 | 0 |
| 121.158.3.40 | 2040398632 | 0 |
| 121.158.3.41 | 2040398633 | 0 |
| 121.158.3.42 | 2040398634 | 0 |
| 121.158.3.43 | 2040398635 | 0 |
| 121.158.3.44 | 2040398636 | 0 |
| 121.158.3.45 | 2040398637 | 0 |
| 121.158.3.46 | 2040398638 | 0 |
| 121.158.3.47 | 2040398639 | 0 |
| 121.158.3.48 | 2040398640 | 0 |
| 121.158.3.49 | 2040398641 | 0 |
| 121.158.3.50 | 2040398642 | 0 |
| 121.158.3.51 | 2040398643 | 0 |
| 121.158.3.52 | 2040398644 | 0 |
| 121.158.3.53 | 2040398645 | 0 |
| 121.158.3.54 | 2040398646 | 0 |
| 121.158.3.55 | 2040398647 | 0 |
| 121.158.3.56 | 2040398648 | 0 |
| 121.158.3.57 | 2040398649 | 0 |
| 121.158.3.58 | 2040398650 | 0 |
| 121.158.3.59 | 2040398651 | 0 |
| 121.158.3.60 | 2040398652 | 0 |
| 121.158.3.61 | 2040398653 | 0 |
| 121.158.3.62 | 2040398654 | 0 |
| 121.158.3.63 | 2040398655 | 0 |
| 121.158.3.64 | 2040398656 | 0 |
| 121.158.3.65 | 2040398657 | 0 |
| 121.158.3.66 | 2040398658 | 0 |
| 121.158.3.67 | 2040398659 | 0 |
| 121.158.3.68 | 2040398660 | 0 |
| 121.158.3.69 | 2040398661 | 0 |
| 121.158.3.70 | 2040398662 | 0 |
| 121.158.3.71 | 2040398663 | 0 |
| 121.158.3.72 | 2040398664 | 0 |
| 121.158.3.73 | 2040398665 | 0 |
| 121.158.3.74 | 2040398666 | 0 |
| 121.158.3.75 | 2040398667 | 0 |
| 121.158.3.76 | 2040398668 | 0 |
| 121.158.3.77 | 2040398669 | 0 |
| 121.158.3.78 | 2040398670 | 0 |
| 121.158.3.79 | 2040398671 | 0 |
| 121.158.3.80 | 2040398672 | 0 |
| 121.158.3.81 | 2040398673 | 0 |
| 121.158.3.82 | 2040398674 | 0 |
| 121.158.3.83 | 2040398675 | 0 |
| 121.158.3.84 | 2040398676 | 0 |
| 121.158.3.85 | 2040398677 | 0 |