iP or domain name lookup

conference.coursera.org Server iP：

Current resolution：

domain resolution record：

2019-08-14-----2023-10-12 52.0.97.60

2021-06-08-----2023-10-12 107.23.27.46

2023-10-12-----2023-10-12 54.209.195.215

2021-12-19-----2021-12-19 3.213.113.251

2021-12-19-----2021-12-19 54.205.120.206

2019-08-14-----2021-09-26 52.6.210.116

2020-07-25-----2021-06-08 107.21.27.58

2020-07-25-----2021-06-08 107.23.99.193

2020-07-25-----2021-06-08 52.6.53.236

2019-08-14-----2020-07-25 52.4.1.216

2020-07-25-----2020-07-25 52.7.10.126

2020-07-25-----2020-07-25 107.23.9.24