iP or domain name lookup

mail.o365.irco.com Server iP：

Current resolution：

domain resolution record：

2024-08-16-----2024-08-16 104.26.4.148

2019-07-21-----2021-06-12 40.103.21.86

2019-07-21-----2021-06-12 40.103.21.230

2021-06-12-----2021-06-12 52.96.101.166

2019-07-21-----2021-05-24 40.103.52.134

2019-07-21-----2021-05-24 40.103.21.134

2021-05-24-----2021-05-24 52.96.102.38

2019-07-21-----2020-09-08 40.103.52.230

2019-07-21-----2020-09-08 40.103.53.54

2019-07-21-----2020-01-23 40.103.21.246

2019-07-21-----2020-01-23 40.103.52.214

2017-02-16-----2019-06-10 23.103.239.6

2017-02-16-----2019-06-10 23.103.236.70

2017-02-16-----2019-04-09 23.103.241.198

2017-02-16-----2019-04-09 23.103.239.54