iP or domain name lookup

smtp.serif.com Server iP：

Current resolution：

domain resolution record：

2023-03-17-----2023-03-17 54.216.188.14

2023-03-17-----2023-03-17 34.250.177.55

2023-03-17-----2023-03-17 52.208.183.28

2022-01-17-----2022-01-17 54.72.198.58

2022-01-17-----2022-01-17 34.250.64.15

2019-10-09-----2019-10-09 99.81.99.198

2019-10-09-----2019-10-09 54.171.58.147

2019-07-27-----2019-07-28 54.154.79.149

2019-07-27-----2019-07-27 63.32.114.194

2019-07-17-----2019-07-17 34.251.247.198

2019-07-17-----2019-07-17 54.154.253.77

2019-07-12-----2019-07-12 52.16.210.184

2019-07-12-----2019-07-12 54.194.172.51