Les adresses IP débutant par 121.129.5 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 | 12/12/2018 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | KR | Corée du Sud | - | Reisui | 34,7442 | 127,7378 | 2018-12-11 |
| MaxMind | KR | Corée du Sud | - | Seoul | 37,5111 | 126,9743 | 2018-12-11 |
| Whois | KR | - | - | - | 128 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.129.5.0 | 2038498560 | 0 |
| 121.129.5.1 | 2038498561 | 0 |
| 121.129.5.2 | 2038498562 | 0 |
| 121.129.5.3 | 2038498563 | 0 |
| 121.129.5.4 | 2038498564 | 0 |
| 121.129.5.5 | 2038498565 | 0 |
| 121.129.5.6 | 2038498566 | 0 |
| 121.129.5.7 | 2038498567 | 0 |
| 121.129.5.8 | 2038498568 | 0 |
| 121.129.5.9 | 2038498569 | 0 |
| 121.129.5.10 | 2038498570 | 0 |
| 121.129.5.11 | 2038498571 | 0 |
| 121.129.5.12 | 2038498572 | 0 |
| 121.129.5.13 | 2038498573 | 0 |
| 121.129.5.14 | 2038498574 | 0 |
| 121.129.5.15 | 2038498575 | 0 |
| 121.129.5.16 | 2038498576 | 0 |
| 121.129.5.17 | 2038498577 | 0 |
| 121.129.5.18 | 2038498578 | 0 |
| 121.129.5.19 | 2038498579 | 0 |
| 121.129.5.20 | 2038498580 | 0 |
| 121.129.5.21 | 2038498581 | 0 |
| 121.129.5.22 | 2038498582 | 0 |
| 121.129.5.23 | 2038498583 | 0 |
| 121.129.5.24 | 2038498584 | 0 |
| 121.129.5.25 | 2038498585 | 0 |
| 121.129.5.26 | 2038498586 | 0 |
| 121.129.5.27 | 2038498587 | 0 |
| 121.129.5.28 | 2038498588 | 0 |
| 121.129.5.29 | 2038498589 | 0 |
| 121.129.5.30 | 2038498590 | 0 |
| 121.129.5.31 | 2038498591 | 0 |
| 121.129.5.32 | 2038498592 | 0 |
| 121.129.5.33 | 2038498593 | 0 |
| 121.129.5.34 | 2038498594 | 0 |
| 121.129.5.35 | 2038498595 | 0 |
| 121.129.5.36 | 2038498596 | 0 |
| 121.129.5.37 | 2038498597 | 0 |
| 121.129.5.38 | 2038498598 | 0 |
| 121.129.5.39 | 2038498599 | 0 |
| 121.129.5.40 | 2038498600 | 0 |
| 121.129.5.41 | 2038498601 | 0 |
| 121.129.5.42 | 2038498602 | 0 |
| 121.129.5.43 | 2038498603 | 0 |
| 121.129.5.44 | 2038498604 | 0 |
| 121.129.5.45 | 2038498605 | 0 |
| 121.129.5.46 | 2038498606 | 0 |
| 121.129.5.47 | 2038498607 | 0 |
| 121.129.5.48 | 2038498608 | 0 |
| 121.129.5.49 | 2038498609 | 0 |
| 121.129.5.50 | 2038498610 | 0 |
| 121.129.5.51 | 2038498611 | 0 |
| 121.129.5.52 | 2038498612 | 0 |
| 121.129.5.53 | 2038498613 | 0 |
| 121.129.5.54 | 2038498614 | 0 |
| 121.129.5.55 | 2038498615 | 0 |
| 121.129.5.56 | 2038498616 | 0 |
| 121.129.5.57 | 2038498617 | 0 |
| 121.129.5.58 | 2038498618 | 0 |
| 121.129.5.59 | 2038498619 | 0 |
| 121.129.5.60 | 2038498620 | 0 |
| 121.129.5.61 | 2038498621 | 0 |
| 121.129.5.62 | 2038498622 | 0 |
| 121.129.5.63 | 2038498623 | 0 |
| 121.129.5.64 | 2038498624 | 0 |
| 121.129.5.65 | 2038498625 | 0 |
| 121.129.5.66 | 2038498626 | 0 |
| 121.129.5.67 | 2038498627 | 0 |
| 121.129.5.68 | 2038498628 | 0 |
| 121.129.5.69 | 2038498629 | 0 |
| 121.129.5.70 | 2038498630 | 0 |
| 121.129.5.71 | 2038498631 | 0 |
| 121.129.5.72 | 2038498632 | 0 |
| 121.129.5.73 | 2038498633 | 0 |
| 121.129.5.74 | 2038498634 | 0 |
| 121.129.5.75 | 2038498635 | 0 |
| 121.129.5.76 | 2038498636 | 0 |
| 121.129.5.77 | 2038498637 | 0 |
| 121.129.5.78 | 2038498638 | 0 |
| 121.129.5.79 | 2038498639 | 0 |
| 121.129.5.80 | 2038498640 | 0 |
| 121.129.5.81 | 2038498641 | 0 |
| 121.129.5.82 | 2038498642 | 0 |
| 121.129.5.83 | 2038498643 | 0 |
| 121.129.5.84 | 2038498644 | 0 |
| 121.129.5.85 | 2038498645 | 0 |