How can I tell if someone is using wordpress?

Question

Can I tell by looking at the source code if someone is using wordpress?

Answer 1

Yes. View source and look at the meta generator tag. You'll see something like this if they're using Wordpress:

<meta name="generator" content="WordPress 3.0" />

Answer 2

Check if it has this meta-tag as most Wordpress solutions have:

<meta name="generator" content="WordPress 3.0.1" />

Or go to /wp-admin/ on the domain to see if there is an adminstration login.