Creating a blog ID is easy. All you need is a valid email address and a blog name. You can find your blog name on the “My Blog” page on the WordPress.
com site. Log in to your account, click on “My Blog,” and find your blog name in the list of posts. Copy the blog’s URL, which is the address that looks like this: http://www.example.com/blogname.
Next, go to id.WordPress.com and enter your blog URL into the “Enter Your Blog’s Name” field. Click on the “Create Blog ID” button to generate an ID for your blog.
You’ll be asked to verify your email address. If everything looks good, click on the “Create Blog ID” button to finish up.