You can establish a more professional identity for your Blogger® blog by configuring it to point to one of the domain names you registered through us. Instead of entering your Blogger URL to view your latest blog post, visitors enter your domain name's URL. For example, by mapping your coolexample.blogspot.com blog to your www.coolexample.com domain name, visitors focus solely on your domain name.
To point your Blogger blog to your domain name, you set up domain name mapping, which configures your blog settings and domain name. You update your settings in your Blogger account and our DNS Zone File:
Park the domain name you want to use with your Blogger account on our parked nameservers. For more information, see Parking Your Domain Name.
Edit the www CNAME record for the domain name you want to use with your Blogger account. This update tells the Web browser to open your Blogger blog when visitors enter your domain name's URL in the browser address bar.
Next, you'll need to create separate A records for each of the IPs listed in step 9 of this Google help article.
For instructions on configuring separate A records, please visit Manage DNS for Your Domain Names under the segment Adding or Editing A Records. Each of the records should have the host @
Using instructions from the same help article listed above, configure your Blogger account to use your domain name.