.asp subdomain

I have a website on a .asp server. I gather that WP must be hosted on a php server. Does this mean that I can’t have my new blog as a subdomain of my main site? eg https://www.site.co.uk/blog?
I haven’t uploaded WP yet, as there seems no point if I can’t do this. I’d appreciate it if anyone can shed light on this for this confused novice!