iP or domain name lookup

webmail.sina.net Server iP：

Current resolution：

domain resolution record：

2019-07-12-----2026-01-29 49.7.36.125

2023-10-19-----2026-01-29 36.51.254.76

2025-03-05-----2026-01-29 116.133.8.112

2019-07-12-----2023-10-19 123.126.45.223

2021-05-06-----2022-01-29 39.156.6.189

2019-07-12-----2019-10-28 221.179.190.188

2017-08-01-----2018-01-17 202.108.35.23

2017-08-01-----2018-01-17 218.30.108.198

2017-11-20-----2018-01-17 111.13.88.52