iP or domain name lookup

etc1.91pool.com Server iP：

Current resolution：

domain resolution record：

2018-07-09-----2018-10-16 180.97.158.207

2018-10-16-----2018-10-16 118.212.233.194

2018-07-09-----2018-07-09 180.97.158.178

2017-12-01-----2017-12-02 119.188.35.44

2017-12-01-----2017-12-02 116.55.250.236

2017-09-10-----2017-09-10 180.97.158.245

2017-09-10-----2017-09-10 118.212.233.186

2017-06-28-----2017-08-13 106.119.182.245

2017-06-28-----2017-08-12 123.155.158.118

2017-07-18-----2017-07-23 113.207.76.87

2017-07-18-----2017-07-22 180.97.158.249

2017-03-10-----2017-04-07 218.65.212.220