iP or domain name lookup

s1.smartstudy.com Server iP：

Current resolution：

domain resolution record：

2021-02-11-----2021-11-19 221.181.200.222

2021-02-11-----2021-11-19 58.218.215.142

2021-11-19-----2021-11-19 36.102.212.86

2021-11-19-----2021-11-19 111.12.25.210

2021-11-19-----2021-11-19 27.221.44.39

2021-11-19-----2021-11-19 125.37.206.224

2021-11-19-----2021-11-19 111.63.56.216

2021-11-19-----2021-11-19 221.15.65.167

2019-07-15-----2021-02-11 183.6.231.5

2021-02-11-----2021-02-11 118.123.2.193

2021-02-11-----2021-02-11 124.236.20.209

2021-02-11-----2021-02-11 125.37.206.219

2019-08-24-----2019-10-01 222.85.26.224

2019-07-15-----2019-08-24 114.80.187.102

2019-07-15-----2019-08-24 183.232.159.204

2019-07-15-----2019-08-24 61.168.100.231

2019-07-15-----2019-08-24 140.249.61.179

2019-07-15-----2019-08-24 27.221.30.58

2019-07-15-----2019-08-24 58.218.208.12

2019-08-24-----2019-08-24 112.25.18.133

2019-08-24-----2019-08-24 112.54.108.104

2019-08-24-----2019-08-24 119.147.40.243

2019-08-24-----2019-08-24 61.240.154.104

2019-07-15-----2019-07-15 42.81.4.93

2019-07-15-----2019-07-15 175.6.235.228

2019-07-15-----2019-07-15 223.111.24.99

2017-08-06-----2017-08-07 220.181.105.240

2017-08-07-----2017-08-07 183.232.156.26

2017-08-07-----2017-08-07 183.232.156.29

2017-08-07-----2017-08-07 220.181.105.241

2017-08-06-----2017-08-06 124.160.136.171

2017-08-06-----2017-08-06 125.76.247.211

2017-08-06-----2017-08-06 211.138.122.234

2017-08-06-----2017-08-06 42.81.4.44

2017-08-06-----2017-08-06 122.225.34.184

2017-08-06-----2017-08-06 125.76.247.178

2017-08-06-----2017-08-06 121.9.212.222

2017-08-06-----2017-08-06 182.140.238.87

2017-08-06-----2017-08-06 122.225.34.236

2017-08-06-----2017-08-06 182.140.245.29

2017-08-06-----2017-08-06 124.160.136.236

2017-08-06-----2017-08-06 123.6.7.32

2017-08-06-----2017-08-06 122.225.34.186

2017-08-06-----2017-08-06 123.6.7.30

2017-08-06-----2017-08-06 124.232.157.92

2017-08-06-----2017-08-06 42.81.4.45

2017-08-06-----2017-08-06 220.181.105.183