iP or domain name lookup

z.syasn.com Server iP：

Current resolution：

domain resolution record：

2021-09-15-----2021-09-15 91.195.240.94

2016-10-24-----2021-03-04 222.186.61.126

2016-12-25-----2020-01-26 221.229.204.74

2018-02-22-----2020-01-26 222.186.61.99

2019-12-01-----2020-01-26 112.85.241.153

2017-02-06-----2017-09-06 120.198.231.157

2017-03-24-----2017-08-22 120.198.231.162

2017-04-01-----2017-07-24 120.198.231.155

2017-04-12-----2017-07-23 120.198.231.156

2017-02-19-----2017-02-19 120.198.231.163

2017-01-19-----2017-01-31 120.198.231.161