iP or domain name lookup

17app.co Server iP：

Current resolution：

domain resolution record：

2017-06-13-----2017-06-13 54.148.91.237

2017-06-13-----2017-06-13 34.209.67.22

2017-03-29-----2017-03-29 52.26.218.187

2017-03-29-----2017-03-29 54.148.26.193

2017-01-29-----2017-02-06 54.70.168.4

2017-02-06-----2017-02-06 52.32.245.27

2017-01-29-----2017-01-29 52.24.91.60

2016-12-01-----2017-01-03 54.148.69.158