iP or domain name lookup

cn4.cm101.rsvp Server iP：

Current resolution：

domain resolution record：

2024-01-24-----2024-01-24 20.2.50.194

2024-01-24-----2024-01-24 20.255.206.179

2023-12-30-----2024-01-23 20.255.201.201

2024-01-23-----2024-01-23 20.255.218.248

2024-01-05-----2024-01-06 20.239.2.194

2024-01-05-----2024-01-06 20.24.232.153

2024-01-03-----2024-01-05 52.246.138.245

2024-01-05-----2024-01-05 156.251.239.11

2024-01-05-----2024-01-05 156.251.239.109

2024-01-03-----2024-01-03 156.251.239.13

2023-12-30-----2023-12-30 156.251.239.100

2023-12-30-----2023-12-30 20.24.235.65