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Instructions for Mapping Subdomains
Add a CNAME record through the registrar where you purchased your domain or through your DNS provider. You should NOT change your Name Server information if you wish to only map a subdomain. The CNAME should look something like the following (please note the fullstop character at the end of each domain name):
subdomain.yourdomain.com. IN CNAME yourblog.wordpress.com.
Instructions on how to add a CNAME record can vary between domain registrars. If you’re unsure of how to do this, we recommend contacting your domain registrar for assistance with this step. Your domain registrar is typically whoever you purchased your domain from. Here’s a sample email you can send (replace the example subdomain and WordPress.com blog address given with your own subdomain and blog address):
I would like to map a subdomain of my domain to my blog, which is hosted at WordPress.com. I want to use the subdomain blog.mygroovydomain.com. Can you please add a CNAME record to point that subdomain to example.wordpress.com?
Once the CNAME record has been added and verified, go to Store → My Domains and add the subdomain to your blog. If everything is configured correctly, you will be prompted to pay for the upgrade and complete the mapping process. subdomain_map2
After you have made your purchase, go to Store → My Domains, select the radio button next to your custom domain, and click the Update Primary Domain button. domain settings
Please note, you may see a Redirect Loop error page if you immediately visit your site after setting a new Primary Domain. This is usually fixed within a few seconds by refreshing the page.
Note: WordPress.com automatically removes the “www” from all URLs. Mapping the “www” subdomain is not supported. Also, we do not currently allow mapping to subdirectories, such as example.com/blog.
Same Rules Apply – The Domain Mapping Upgrade does not enable the permission to use advertising, any kind of prohibited code, or upload additional themes or plugins. With the upgrade, your blog will still be hosted here at WordPress.com, which means that you will not have FTP access to your files and you will still be required abide by our Terms of Service.
Mapping a subdomain with the Domain Mapping Upgrade costs $13.00 per subdomain, per blog, per year.