Create a CNAME entry for 250ok analytics in your domain provider and point it to 250analytics.com.
Log in to 250ok and click on ANALYTICS, then SETTINGS to open the Manage Domains menu.
Click on the ADD DOMAIN button. The Add a Custom Domain window will open and you will be prompted to enter your domain. After entering your domain click the SAVE button. The domain will now appear in the list of domains on the Manage Domains menu.
In the Verified column you will notice a CLICK TO VERIFY link. Click the CLICK TO VERIFY link. If your domain is verified successfully you will see a green checkmark appear in the Verified column.