iP or domain name lookup

opt.dl.ourdvs.com Server iP：

Current resolution：

domain resolution record：

2017-04-17-----2017-04-17 58.220.6.78

2017-04-17-----2017-04-17 60.5.255.61

2017-04-17-----2017-04-17 61.53.234.154

2017-04-17-----2017-04-17 120.241.56.249

2017-04-17-----2017-04-17 58.216.22.40

2017-04-17-----2017-04-17 14.215.100.37

2017-04-17-----2017-04-17 58.218.208.81

2017-04-17-----2017-04-17 60.174.241.83

2017-04-17-----2017-04-17 61.188.191.86

2017-04-17-----2017-04-17 112.25.82.245

2017-04-17-----2017-04-17 180.97.180.95