Les adresses IP débutant par 121.158.5 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 | 29/10/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | KR | Corée du Sud | - | Kwangmyong | 37,4772 | 126,8664 | 2017-10-29 |
| MaxMind | KR | Corée du Sud | - | Seoul | 37,5111 | 126,9743 | 2017-10-29 |
| Whois | KR | - | - | - | 128 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.158.5.0 | 2040399104 | 0 |
| 121.158.5.1 | 2040399105 | 0 |
| 121.158.5.2 | 2040399106 | 0 |
| 121.158.5.3 | 2040399107 | 0 |
| 121.158.5.4 | 2040399108 | 0 |
| 121.158.5.5 | 2040399109 | 0 |
| 121.158.5.6 | 2040399110 | 0 |
| 121.158.5.7 | 2040399111 | 0 |
| 121.158.5.8 | 2040399112 | 0 |
| 121.158.5.9 | 2040399113 | 0 |
| 121.158.5.10 | 2040399114 | 0 |
| 121.158.5.11 | 2040399115 | 0 |
| 121.158.5.12 | 2040399116 | 0 |
| 121.158.5.13 | 2040399117 | 0 |
| 121.158.5.14 | 2040399118 | 0 |
| 121.158.5.15 | 2040399119 | 0 |
| 121.158.5.16 | 2040399120 | 0 |
| 121.158.5.17 | 2040399121 | 0 |
| 121.158.5.18 | 2040399122 | 0 |
| 121.158.5.19 | 2040399123 | 0 |
| 121.158.5.20 | 2040399124 | 0 |
| 121.158.5.21 | 2040399125 | 0 |
| 121.158.5.22 | 2040399126 | 0 |
| 121.158.5.23 | 2040399127 | 0 |
| 121.158.5.24 | 2040399128 | 0 |
| 121.158.5.25 | 2040399129 | 0 |
| 121.158.5.26 | 2040399130 | 0 |
| 121.158.5.27 | 2040399131 | 0 |
| 121.158.5.28 | 2040399132 | 0 |
| 121.158.5.29 | 2040399133 | 0 |
| 121.158.5.30 | 2040399134 | 0 |
| 121.158.5.31 | 2040399135 | 0 |
| 121.158.5.32 | 2040399136 | 0 |
| 121.158.5.33 | 2040399137 | 0 |
| 121.158.5.34 | 2040399138 | 0 |
| 121.158.5.35 | 2040399139 | 0 |
| 121.158.5.36 | 2040399140 | 0 |
| 121.158.5.37 | 2040399141 | 0 |
| 121.158.5.38 | 2040399142 | 0 |
| 121.158.5.39 | 2040399143 | 0 |
| 121.158.5.40 | 2040399144 | 0 |
| 121.158.5.41 | 2040399145 | 0 |
| 121.158.5.42 | 2040399146 | 0 |
| 121.158.5.43 | 2040399147 | 0 |
| 121.158.5.44 | 2040399148 | 0 |
| 121.158.5.45 | 2040399149 | 0 |
| 121.158.5.46 | 2040399150 | 0 |
| 121.158.5.47 | 2040399151 | 0 |
| 121.158.5.48 | 2040399152 | 0 |
| 121.158.5.49 | 2040399153 | 0 |
| 121.158.5.50 | 2040399154 | 0 |
| 121.158.5.51 | 2040399155 | 0 |
| 121.158.5.52 | 2040399156 | 0 |
| 121.158.5.53 | 2040399157 | 0 |
| 121.158.5.54 | 2040399158 | 0 |
| 121.158.5.55 | 2040399159 | 0 |
| 121.158.5.56 | 2040399160 | 0 |
| 121.158.5.57 | 2040399161 | 0 |
| 121.158.5.58 | 2040399162 | 0 |
| 121.158.5.59 | 2040399163 | 0 |
| 121.158.5.60 | 2040399164 | 0 |
| 121.158.5.61 | 2040399165 | 0 |
| 121.158.5.62 | 2040399166 | 0 |
| 121.158.5.63 | 2040399167 | 0 |
| 121.158.5.64 | 2040399168 | 0 |
| 121.158.5.65 | 2040399169 | 0 |
| 121.158.5.66 | 2040399170 | 0 |
| 121.158.5.67 | 2040399171 | 0 |
| 121.158.5.68 | 2040399172 | 0 |
| 121.158.5.69 | 2040399173 | 0 |
| 121.158.5.70 | 2040399174 | 0 |
| 121.158.5.71 | 2040399175 | 0 |
| 121.158.5.72 | 2040399176 | 0 |
| 121.158.5.73 | 2040399177 | 0 |
| 121.158.5.74 | 2040399178 | 0 |
| 121.158.5.75 | 2040399179 | 0 |
| 121.158.5.76 | 2040399180 | 0 |
| 121.158.5.77 | 2040399181 | 0 |
| 121.158.5.78 | 2040399182 | 0 |
| 121.158.5.79 | 2040399183 | 0 |
| 121.158.5.80 | 2040399184 | 0 |
| 121.158.5.81 | 2040399185 | 0 |
| 121.158.5.82 | 2040399186 | 0 |
| 121.158.5.83 | 2040399187 | 0 |
| 121.158.5.84 | 2040399188 | 0 |
| 121.158.5.85 | 2040399189 | 0 |