La dirección IP 42.20.21 es proporcionada por SK Telecom, que es propiedad de la CIDR (Classless Inter-Domain Routing) 42.16.0.0/12, IP entre 42.16.0.0 a 42.31.255.255 ). El número de sistema autónomo (ASN) es 9644.
| ASN | 9644 |
| IP que comienzan con | 42.16.0.0 |
| IP que termina con | 42.31.255.255 |
| ASN Nombre | SK Telecom |
| CDIR | 42.16.0.0/12 |
| IP numérica | |
| Registe | apnic |
| Última actualización | 05/07/2017 |

| Código País | País | Región | Ciudad | Latitud | Longitud | Última actualización | |
| IP2Location | KR | Korea, Republic of | - | Seoul | 37,5683 | 126,9778 | 2017-07-05 |
| MaxMind | KR | Corea del Sur | - | - | 37,5112 | 126,9741 | 2017-07-05 |
| Whois | KR | - | - | - | 128 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 42.20.21.0 | 705959168 | 0 |
| 42.20.21.1 | 705959169 | 0 |
| 42.20.21.2 | 705959170 | 0 |
| 42.20.21.3 | 705959171 | 0 |
| 42.20.21.4 | 705959172 | 0 |
| 42.20.21.5 | 705959173 | 0 |
| 42.20.21.6 | 705959174 | 0 |
| 42.20.21.7 | 705959175 | 0 |
| 42.20.21.8 | 705959176 | 0 |
| 42.20.21.9 | 705959177 | 0 |
| 42.20.21.10 | 705959178 | 0 |
| 42.20.21.11 | 705959179 | 0 |
| 42.20.21.12 | 705959180 | 0 |
| 42.20.21.13 | 705959181 | 0 |
| 42.20.21.14 | 705959182 | 0 |
| 42.20.21.15 | 705959183 | 0 |
| 42.20.21.16 | 705959184 | 0 |
| 42.20.21.17 | 705959185 | 0 |
| 42.20.21.18 | 705959186 | 0 |
| 42.20.21.19 | 705959187 | 0 |
| 42.20.21.20 | 705959188 | 0 |
| 42.20.21.21 | 705959189 | 0 |
| 42.20.21.22 | 705959190 | 0 |
| 42.20.21.23 | 705959191 | 0 |
| 42.20.21.24 | 705959192 | 0 |
| 42.20.21.25 | 705959193 | 0 |
| 42.20.21.26 | 705959194 | 0 |
| 42.20.21.27 | 705959195 | 0 |
| 42.20.21.28 | 705959196 | 0 |
| 42.20.21.29 | 705959197 | 0 |
| 42.20.21.30 | 705959198 | 0 |
| 42.20.21.31 | 705959199 | 0 |
| 42.20.21.32 | 705959200 | 0 |
| 42.20.21.33 | 705959201 | 0 |
| 42.20.21.34 | 705959202 | 0 |
| 42.20.21.35 | 705959203 | 0 |
| 42.20.21.36 | 705959204 | 0 |
| 42.20.21.37 | 705959205 | 0 |
| 42.20.21.38 | 705959206 | 0 |
| 42.20.21.39 | 705959207 | 0 |
| 42.20.21.40 | 705959208 | 0 |
| 42.20.21.41 | 705959209 | 0 |
| 42.20.21.42 | 705959210 | 0 |
| 42.20.21.43 | 705959211 | 0 |
| 42.20.21.44 | 705959212 | 0 |
| 42.20.21.45 | 705959213 | 0 |
| 42.20.21.46 | 705959214 | 0 |
| 42.20.21.47 | 705959215 | 0 |
| 42.20.21.48 | 705959216 | 0 |
| 42.20.21.49 | 705959217 | 0 |
| 42.20.21.50 | 705959218 | 0 |
| 42.20.21.51 | 705959219 | 0 |
| 42.20.21.52 | 705959220 | 0 |
| 42.20.21.53 | 705959221 | 0 |
| 42.20.21.54 | 705959222 | 0 |
| 42.20.21.55 | 705959223 | 0 |
| 42.20.21.56 | 705959224 | 0 |
| 42.20.21.57 | 705959225 | 0 |
| 42.20.21.58 | 705959226 | 0 |
| 42.20.21.59 | 705959227 | 0 |
| 42.20.21.60 | 705959228 | 0 |
| 42.20.21.61 | 705959229 | 0 |
| 42.20.21.62 | 705959230 | 0 |
| 42.20.21.63 | 705959231 | 0 |
| 42.20.21.64 | 705959232 | 0 |
| 42.20.21.65 | 705959233 | 0 |
| 42.20.21.66 | 705959234 | 0 |
| 42.20.21.67 | 705959235 | 0 |
| 42.20.21.68 | 705959236 | 0 |
| 42.20.21.69 | 705959237 | 0 |
| 42.20.21.70 | 705959238 | 0 |
| 42.20.21.71 | 705959239 | 0 |
| 42.20.21.72 | 705959240 | 0 |
| 42.20.21.73 | 705959241 | 0 |
| 42.20.21.74 | 705959242 | 0 |
| 42.20.21.75 | 705959243 | 0 |
| 42.20.21.76 | 705959244 | 0 |
| 42.20.21.77 | 705959245 | 0 |
| 42.20.21.78 | 705959246 | 0 |
| 42.20.21.79 | 705959247 | 0 |
| 42.20.21.80 | 705959248 | 0 |
| 42.20.21.81 | 705959249 | 0 |
| 42.20.21.82 | 705959250 | 0 |
| 42.20.21.83 | 705959251 | 0 |
| 42.20.21.84 | 705959252 | 0 |
| 42.20.21.85 | 705959253 | 0 |