iP or domain name lookup

pubsub-1356279420.pubnub.com Server iP：

Current resolution：

domain resolution record：

2022-10-20-----2026-01-19 18.179.18.165

2022-10-20-----2026-01-19 13.232.67.197

2026-01-19-----2026-01-19 52.9.63.130

2022-10-20-----2022-10-20 18.179.18.167

2022-10-20-----2022-10-20 13.232.67.196

2022-10-20-----2022-10-20 18.179.18.166

2020-03-10-----2020-03-10 54.249.82.168

2020-03-10-----2020-03-10 13.232.67.209

2020-03-10-----2020-03-10 54.93.254.234

2020-03-10-----2020-03-10 54.241.191.232