Looks like one of our Australian type dendrobiums but not only are there many species they are so heavily hybridised it would likely be impossible to give a exact identity. It is similiar in form to gracilicaule but that usually has pale white-creamy yellow flowers. Maybe that plus some kingianum. I'm sure there are other things it could be as well though!
It just looks too tall to me to be a straight kingianum. On the up side they are very hardy orchids and very hard to kill. These grow like weeds here but i struggle with phals, not because of my climate but because I am too neglectful. If you can keep phals alive you'll be fine with this one
The flowers on kingianum are very small. These look much too big. I would say biggibum or phaleaenopsis type Den. mostly but could have many others bred into it. It is likely a warmer growing one, not like the ones needing a cold winter rest. Enjoy it as a NOID since it is lovely!