Les adresses IP débutant par 121.158.9 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 | |
| Dernière mise à jour | 07/07/2018 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | KR | Corée du Sud | - | Wonju | 37,3514 | 127,9453 | 2018-07-07 |
| MaxMind | KR | Corée du Sud | - | Wonju | 37,3514 | 127,9453 | 2018-07-07 |
| Whois | KR | - | - | - | 128 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.158.9.0 | 2040400128 | 0 |
| 121.158.9.1 | 2040400129 | 0 |
| 121.158.9.2 | 2040400130 | 0 |
| 121.158.9.3 | 2040400131 | 0 |
| 121.158.9.4 | 2040400132 | 0 |
| 121.158.9.5 | 2040400133 | 0 |
| 121.158.9.6 | 2040400134 | 0 |
| 121.158.9.7 | 2040400135 | 0 |
| 121.158.9.8 | 2040400136 | 0 |
| 121.158.9.9 | 2040400137 | 0 |
| 121.158.9.10 | 2040400138 | 0 |
| 121.158.9.11 | 2040400139 | 0 |
| 121.158.9.12 | 2040400140 | 0 |
| 121.158.9.13 | 2040400141 | 0 |
| 121.158.9.14 | 2040400142 | 0 |
| 121.158.9.15 | 2040400143 | 0 |
| 121.158.9.16 | 2040400144 | 0 |
| 121.158.9.17 | 2040400145 | 0 |
| 121.158.9.18 | 2040400146 | 0 |
| 121.158.9.19 | 2040400147 | 0 |
| 121.158.9.20 | 2040400148 | 0 |
| 121.158.9.21 | 2040400149 | 0 |
| 121.158.9.22 | 2040400150 | 0 |
| 121.158.9.23 | 2040400151 | 0 |
| 121.158.9.24 | 2040400152 | 0 |
| 121.158.9.25 | 2040400153 | 0 |
| 121.158.9.26 | 2040400154 | 0 |
| 121.158.9.27 | 2040400155 | 0 |
| 121.158.9.28 | 2040400156 | 0 |
| 121.158.9.29 | 2040400157 | 0 |
| 121.158.9.30 | 2040400158 | 0 |
| 121.158.9.31 | 2040400159 | 0 |
| 121.158.9.32 | 2040400160 | 0 |
| 121.158.9.33 | 2040400161 | 0 |
| 121.158.9.34 | 2040400162 | 0 |
| 121.158.9.35 | 2040400163 | 0 |
| 121.158.9.36 | 2040400164 | 0 |
| 121.158.9.37 | 2040400165 | 0 |
| 121.158.9.38 | 2040400166 | 0 |
| 121.158.9.39 | 2040400167 | 0 |
| 121.158.9.40 | 2040400168 | 0 |
| 121.158.9.41 | 2040400169 | 0 |
| 121.158.9.42 | 2040400170 | 0 |
| 121.158.9.43 | 2040400171 | 0 |
| 121.158.9.44 | 2040400172 | 0 |
| 121.158.9.45 | 2040400173 | 0 |
| 121.158.9.46 | 2040400174 | 0 |
| 121.158.9.47 | 2040400175 | 0 |
| 121.158.9.48 | 2040400176 | 0 |
| 121.158.9.49 | 2040400177 | 0 |
| 121.158.9.50 | 2040400178 | 0 |
| 121.158.9.51 | 2040400179 | 0 |
| 121.158.9.52 | 2040400180 | 0 |
| 121.158.9.53 | 2040400181 | 0 |
| 121.158.9.54 | 2040400182 | 0 |
| 121.158.9.55 | 2040400183 | 0 |
| 121.158.9.56 | 2040400184 | 0 |
| 121.158.9.57 | 2040400185 | 0 |
| 121.158.9.58 | 2040400186 | 0 |
| 121.158.9.59 | 2040400187 | 0 |
| 121.158.9.60 | 2040400188 | 0 |
| 121.158.9.61 | 2040400189 | 0 |
| 121.158.9.62 | 2040400190 | 0 |
| 121.158.9.63 | 2040400191 | 0 |
| 121.158.9.64 | 2040400192 | 0 |
| 121.158.9.65 | 2040400193 | 0 |
| 121.158.9.66 | 2040400194 | 0 |
| 121.158.9.67 | 2040400195 | 0 |
| 121.158.9.68 | 2040400196 | 0 |
| 121.158.9.69 | 2040400197 | 0 |
| 121.158.9.70 | 2040400198 | 0 |
| 121.158.9.71 | 2040400199 | 0 |
| 121.158.9.72 | 2040400200 | 0 |
| 121.158.9.73 | 2040400201 | 0 |
| 121.158.9.74 | 2040400202 | 0 |
| 121.158.9.75 | 2040400203 | 0 |
| 121.158.9.76 | 2040400204 | 0 |
| 121.158.9.77 | 2040400205 | 0 |
| 121.158.9.78 | 2040400206 | 0 |
| 121.158.9.79 | 2040400207 | 0 |
| 121.158.9.80 | 2040400208 | 0 |
| 121.158.9.81 | 2040400209 | 0 |
| 121.158.9.82 | 2040400210 | 0 |
| 121.158.9.83 | 2040400211 | 0 |
| 121.158.9.84 | 2040400212 | 0 |
| 121.158.9.85 | 2040400213 | 0 |