iP or domain name lookup

blog.coursera.org Server iP：

Current resolution：

domain resolution record：

2017-07-10-----2024-02-12 52.6.53.236

2019-07-12-----2024-02-12 52.0.97.60

2019-08-05-----2024-02-12 52.6.210.116

2022-12-05-----2023-02-23 18.214.177.138

2022-12-05-----2023-02-23 54.160.255.142

2022-12-05-----2023-02-23 184.73.251.209

2022-12-05-----2023-02-23 54.243.77.25

2022-12-05-----2023-02-23 52.23.0.187

2023-02-23-----2023-02-23 3.95.96.73

2022-12-05-----2023-02-04 54.159.193.142

2023-02-04-----2023-02-04 35.168.127.23

2023-02-04-----2023-02-04 54.174.84.91

2023-02-04-----2023-02-04 54.146.195.73

2021-06-08-----2021-06-08 107.21.27.58

2021-06-08-----2021-06-08 107.23.99.193

2021-06-08-----2021-06-08 107.23.27.46

2017-07-10-----2019-09-30 52.4.1.216

2017-07-10-----2017-07-14 52.7.10.126