iP or domain name lookup

sendgrid.net Server iP：

Current resolution：

domain resolution record：

2018-01-12-----2024-04-14 167.89.123.54

2023-09-24-----2024-04-14 167.89.115.150

2018-01-12-----2024-04-13 167.89.115.56

2018-01-12-----2024-04-13 167.89.118.52

2020-10-23-----2024-04-13 167.89.115.120

2020-11-03-----2024-04-13 167.89.123.124

2020-11-27-----2024-04-13 167.89.118.83

2023-09-24-----2024-04-13 167.89.118.120

2023-10-06-----2024-04-13 167.89.123.204