I found this today that if you have a domain on hosting comany A and you created a subdomian for your site and now you would like to host this subdomian to a different hosting company B . Then these are the steps that you would need to follow.
Step 1) Create your subdomain at your primary hosting company A
Step 2) Log in to your hosting company B account and assign the subdomain that you created in step 1 to your account.
Step 3) Obtain IP address of your hosting account at hosting company B
Step 4) Log back into your hosting account A and allocate the IP address that you obtained in step 3 to your subdomian so that it points to your new hosting.
Thats it . Hope it helps .
