The IP address 42.18.21 is provided by SK Telecom, it's belong to the CDIR (Classless Inter-Domain Routing) 42.16.0.0/12 (range 42.16.0.0 to 42.31.255.255). The autonomous system number (ASN) is 9644.
| ASN | 9644 |
| IP starting by | 42.16.0.0 |
| IP ending by | 42.31.255.255 |
| ASN Name | SK Telecom |
| CDIR | 42.16.0.0/12 |
| Numerical IP | |
| Registry | apnic |
| Last update | 28/07/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | KR | South Korea | - | Seoul | 37.5683 | 126.9778 | 2017-07-28 |
| MaxMind | KR | South Korea | - | - | 37.5112 | 126.9741 | 2017-07-28 |
| Whois | KR | - | - | - | 128 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 42.18.21.0 | 705828096 | 0 |
| 42.18.21.1 | 705828097 | 0 |
| 42.18.21.2 | 705828098 | 0 |
| 42.18.21.3 | 705828099 | 0 |
| 42.18.21.4 | 705828100 | 0 |
| 42.18.21.5 | 705828101 | 0 |
| 42.18.21.6 | 705828102 | 0 |
| 42.18.21.7 | 705828103 | 0 |
| 42.18.21.8 | 705828104 | 0 |
| 42.18.21.9 | 705828105 | 0 |
| 42.18.21.10 | 705828106 | 0 |
| 42.18.21.11 | 705828107 | 0 |
| 42.18.21.12 | 705828108 | 0 |
| 42.18.21.13 | 705828109 | 0 |
| 42.18.21.14 | 705828110 | 0 |
| 42.18.21.15 | 705828111 | 0 |
| 42.18.21.16 | 705828112 | 0 |
| 42.18.21.17 | 705828113 | 0 |
| 42.18.21.18 | 705828114 | 0 |
| 42.18.21.19 | 705828115 | 0 |
| 42.18.21.20 | 705828116 | 0 |
| 42.18.21.21 | 705828117 | 0 |
| 42.18.21.22 | 705828118 | 0 |
| 42.18.21.23 | 705828119 | 0 |
| 42.18.21.24 | 705828120 | 0 |
| 42.18.21.25 | 705828121 | 0 |
| 42.18.21.26 | 705828122 | 0 |
| 42.18.21.27 | 705828123 | 0 |
| 42.18.21.28 | 705828124 | 0 |
| 42.18.21.29 | 705828125 | 0 |
| 42.18.21.30 | 705828126 | 0 |
| 42.18.21.31 | 705828127 | 0 |
| 42.18.21.32 | 705828128 | 0 |
| 42.18.21.33 | 705828129 | 0 |
| 42.18.21.34 | 705828130 | 0 |
| 42.18.21.35 | 705828131 | 0 |
| 42.18.21.36 | 705828132 | 0 |
| 42.18.21.37 | 705828133 | 0 |
| 42.18.21.38 | 705828134 | 0 |
| 42.18.21.39 | 705828135 | 0 |
| 42.18.21.40 | 705828136 | 0 |
| 42.18.21.41 | 705828137 | 0 |
| 42.18.21.42 | 705828138 | 0 |
| 42.18.21.43 | 705828139 | 0 |
| 42.18.21.44 | 705828140 | 0 |
| 42.18.21.45 | 705828141 | 0 |
| 42.18.21.46 | 705828142 | 0 |
| 42.18.21.47 | 705828143 | 0 |
| 42.18.21.48 | 705828144 | 0 |
| 42.18.21.49 | 705828145 | 0 |
| 42.18.21.50 | 705828146 | 0 |
| 42.18.21.51 | 705828147 | 0 |
| 42.18.21.52 | 705828148 | 0 |
| 42.18.21.53 | 705828149 | 0 |
| 42.18.21.54 | 705828150 | 0 |
| 42.18.21.55 | 705828151 | 0 |
| 42.18.21.56 | 705828152 | 0 |
| 42.18.21.57 | 705828153 | 0 |
| 42.18.21.58 | 705828154 | 0 |
| 42.18.21.59 | 705828155 | 0 |
| 42.18.21.60 | 705828156 | 0 |
| 42.18.21.61 | 705828157 | 0 |
| 42.18.21.62 | 705828158 | 0 |
| 42.18.21.63 | 705828159 | 0 |
| 42.18.21.64 | 705828160 | 0 |
| 42.18.21.65 | 705828161 | 0 |
| 42.18.21.66 | 705828162 | 0 |
| 42.18.21.67 | 705828163 | 0 |
| 42.18.21.68 | 705828164 | 0 |
| 42.18.21.69 | 705828165 | 0 |
| 42.18.21.70 | 705828166 | 0 |
| 42.18.21.71 | 705828167 | 0 |
| 42.18.21.72 | 705828168 | 0 |
| 42.18.21.73 | 705828169 | 0 |
| 42.18.21.74 | 705828170 | 0 |
| 42.18.21.75 | 705828171 | 0 |
| 42.18.21.76 | 705828172 | 0 |
| 42.18.21.77 | 705828173 | 0 |
| 42.18.21.78 | 705828174 | 0 |
| 42.18.21.79 | 705828175 | 0 |
| 42.18.21.80 | 705828176 | 0 |
| 42.18.21.81 | 705828177 | 0 |
| 42.18.21.82 | 705828178 | 0 |
| 42.18.21.83 | 705828179 | 0 |
| 42.18.21.84 | 705828180 | 0 |
| 42.18.21.85 | 705828181 | 0 |