Four years ago, I set up a CName record, pointing “letter.talkaboutbooks.net” at my Micro.blog blog. I didn’t do anything with the root domain (talkaboutbooks.net) so it isn’t pointing anywhere. Can I set up an A record too so it’s pointing to the same place? According to the Help pages, I should point it to 104.200.22.214 (or 49.13.40.136 in Europe) but do I need to add anything else so that the DNS knows where on MB my blog is?
Related question: I’m in Europe (Ireland) so I should probably be using the European server instead. Here, the help page says that the CName record should be going to “eu.micro.blog”. Presumably I should put my MB username before that, i.e. “artkavanagh.eu.micro.blog”?
The short answers to your three questions are yes, no, no.
And for the longer answer… It’s enough to set up an A record pointing to the IP address. When a browser sends a request to a web server, it provides the domain name too (talkaboutbooks.net in your case), so Micro.blog will be able to figure out which blog to serve up.
And no, the documentation is right about the CNAME, it should be just eu.micro.blog.
Just wanted to add one thing: I’ve consolidated some of the blog creation options to the Account page. Click on “New Blog” and you should see “New Domain Alias”, which can be useful for redirecting multiple domain names to the same place.
For example, on the blog settings you could change your blog to your root domain, then add a domain alias for “letter.talkaboutbooks.net” so it redirects to the root domain name. Or vice versa.
