iP or domain name lookup

courses.illinois.edu Server iP：

Current resolution：

domain resolution record：

2025-02-19-----2025-03-22 18.223.77.237

2025-03-22-----2025-03-22 3.20.17.238

2025-03-22-----2025-03-22 3.143.150.71

2025-03-14-----2025-03-14 18.224.189.72

2025-03-14-----2025-03-14 18.219.181.153

2025-02-19-----2025-02-19 13.59.98.31

2025-01-17-----2025-01-17 3.147.23.185

2025-01-17-----2025-01-17 3.17.227.107

2025-01-04-----2025-01-04 52.14.102.78

2025-01-04-----2025-01-04 3.135.130.196

2024-12-11-----2024-12-11 3.140.203.228

2024-12-11-----2024-12-11 52.14.52.200

2024-07-26-----2024-07-26 3.142.127.159

2024-07-26-----2024-07-26 3.12.90.67

2024-06-17-----2024-06-17 3.131.84.112

2024-06-17-----2024-06-17 3.20.86.127

2024-03-06-----2024-03-06 3.23.220.214

2024-03-06-----2024-03-06 18.191.94.187

2023-10-20-----2023-11-08 3.19.190.214

2023-11-08-----2023-11-08 3.141.61.153

2023-10-13-----2023-10-20 18.189.176.150

2023-10-13-----2023-10-13 3.131.8.215

2023-03-26-----2023-03-26 3.18.209.111

2023-03-26-----2023-03-26 3.22.174.26

2023-03-26-----2023-03-26 18.218.161.84

2022-06-21-----2022-06-28 18.118.222.123

2022-06-21-----2022-06-28 3.22.159.243

2022-06-21-----2022-06-28 3.19.116.83

2022-06-21-----2022-06-21 13.59.132.109

2021-02-03-----2021-02-03 18.217.134.253

2021-02-03-----2021-02-03 3.18.177.54

2021-02-03-----2021-02-03 3.132.173.109