Question about sub.domains

I'm trying to host a blog script that gives each users their own unique subdomain. However my host won't allow me to get an IP address for some odd reason which is needed by my registrar for a wildcard domain configuration.

Do I really need a dedicated IP?

My solution would be to purchase a .net of my domain and host it with a different provider so my users can have their subdomain. but I'm just not too fond of a .net

 

 

 

 

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