The IP address 121.157.3 is provided by Korea Telecom, it's belong to the CDIR (Classless Inter-Domain Routing) 121.128.0.0/11 (range 121.128.0.0 to 121.159.255.255). The autonomous system number (ASN) is 4766.
| ASN | 4766 |
| IP starting by | 121.128.0.0 |
| IP ending by | 121.159.255.255 |
| ASN Name | Korea Telecom |
| CDIR | 121.128.0.0/11 |
| Numerical IP | |
| Registry | apnic |
| Last update | 03/12/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | KR | South Korea | - | Seoul | 37.5683 | 126.9778 | 2017-12-03 |
| MaxMind | KR | South Korea | - | - | 37.5112 | 126.9741 | 2017-12-03 |
| Whois | KR | - | - | - | 128 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.157.3.0 | 2040333056 | 0 |
| 121.157.3.1 | 2040333057 | 0 |
| 121.157.3.2 | 2040333058 | 0 |
| 121.157.3.3 | 2040333059 | 0 |
| 121.157.3.4 | 2040333060 | 0 |
| 121.157.3.5 | 2040333061 | 0 |
| 121.157.3.6 | 2040333062 | 0 |
| 121.157.3.7 | 2040333063 | 0 |
| 121.157.3.8 | 2040333064 | 0 |
| 121.157.3.9 | 2040333065 | 0 |
| 121.157.3.10 | 2040333066 | 0 |
| 121.157.3.11 | 2040333067 | 0 |
| 121.157.3.12 | 2040333068 | 0 |
| 121.157.3.13 | 2040333069 | 0 |
| 121.157.3.14 | 2040333070 | 0 |
| 121.157.3.15 | 2040333071 | 0 |
| 121.157.3.16 | 2040333072 | 0 |
| 121.157.3.17 | 2040333073 | 0 |
| 121.157.3.18 | 2040333074 | 0 |
| 121.157.3.19 | 2040333075 | 0 |
| 121.157.3.20 | 2040333076 | 0 |
| 121.157.3.21 | 2040333077 | 0 |
| 121.157.3.22 | 2040333078 | 0 |
| 121.157.3.23 | 2040333079 | 0 |
| 121.157.3.24 | 2040333080 | 0 |
| 121.157.3.25 | 2040333081 | 0 |
| 121.157.3.26 | 2040333082 | 0 |
| 121.157.3.27 | 2040333083 | 0 |
| 121.157.3.28 | 2040333084 | 0 |
| 121.157.3.29 | 2040333085 | 0 |
| 121.157.3.30 | 2040333086 | 0 |
| 121.157.3.31 | 2040333087 | 0 |
| 121.157.3.32 | 2040333088 | 0 |
| 121.157.3.33 | 2040333089 | 0 |
| 121.157.3.34 | 2040333090 | 0 |
| 121.157.3.35 | 2040333091 | 0 |
| 121.157.3.36 | 2040333092 | 0 |
| 121.157.3.37 | 2040333093 | 0 |
| 121.157.3.38 | 2040333094 | 0 |
| 121.157.3.39 | 2040333095 | 0 |
| 121.157.3.40 | 2040333096 | 0 |
| 121.157.3.41 | 2040333097 | 0 |
| 121.157.3.42 | 2040333098 | 0 |
| 121.157.3.43 | 2040333099 | 0 |
| 121.157.3.44 | 2040333100 | 0 |
| 121.157.3.45 | 2040333101 | 0 |
| 121.157.3.46 | 2040333102 | 0 |
| 121.157.3.47 | 2040333103 | 0 |
| 121.157.3.48 | 2040333104 | 0 |
| 121.157.3.49 | 2040333105 | 0 |
| 121.157.3.50 | 2040333106 | 0 |
| 121.157.3.51 | 2040333107 | 0 |
| 121.157.3.52 | 2040333108 | 0 |
| 121.157.3.53 | 2040333109 | 0 |
| 121.157.3.54 | 2040333110 | 0 |
| 121.157.3.55 | 2040333111 | 0 |
| 121.157.3.56 | 2040333112 | 0 |
| 121.157.3.57 | 2040333113 | 0 |
| 121.157.3.58 | 2040333114 | 0 |
| 121.157.3.59 | 2040333115 | 0 |
| 121.157.3.60 | 2040333116 | 0 |
| 121.157.3.61 | 2040333117 | 0 |
| 121.157.3.62 | 2040333118 | 0 |
| 121.157.3.63 | 2040333119 | 0 |
| 121.157.3.64 | 2040333120 | 0 |
| 121.157.3.65 | 2040333121 | 0 |
| 121.157.3.66 | 2040333122 | 0 |
| 121.157.3.67 | 2040333123 | 0 |
| 121.157.3.68 | 2040333124 | 0 |
| 121.157.3.69 | 2040333125 | 0 |
| 121.157.3.70 | 2040333126 | 0 |
| 121.157.3.71 | 2040333127 | 0 |
| 121.157.3.72 | 2040333128 | 0 |
| 121.157.3.73 | 2040333129 | 0 |
| 121.157.3.74 | 2040333130 | 0 |
| 121.157.3.75 | 2040333131 | 0 |
| 121.157.3.76 | 2040333132 | 0 |
| 121.157.3.77 | 2040333133 | 0 |
| 121.157.3.78 | 2040333134 | 0 |
| 121.157.3.79 | 2040333135 | 0 |
| 121.157.3.80 | 2040333136 | 0 |
| 121.157.3.81 | 2040333137 | 0 |
| 121.157.3.82 | 2040333138 | 0 |
| 121.157.3.83 | 2040333139 | 0 |
| 121.157.3.84 | 2040333140 | 0 |
| 121.157.3.85 | 2040333141 | 0 |