How to Find WordPress Attachment IDs

1. Go to your WordPress blog login page, type your user name and password. Click the blue 'Log In' button to go to the Dashboard page.
2. Click the arrow next to 'Media' on the 'Dashboard' menu on the left-hand side of the window.

3. Click 'Library' from the drop-down menu to go to the 'Media Library' page.
4. Hover the mouse over the name of the item in the Media Library. The attachment ID appears as part of the image URL at the bottom of the browser window. As an example, it looks like:http://blogname.wordpress.com/wp-admin/media.php?attachment_id=256