How can I get stats for what 3rd-party sites have embedded our iframe widget?

Question

Say we've produced a widget for other sites to use, like so:

<iframe src="http://example.com/whatever.php" frameBorder="0" width="200px" height="300px"  scrolling="no"></iframe>

The client would like to be able to see within GA who has embedded the thing. Is there some referer information automatically passed that I can look for, or do I need to add something?

whatever.php is already loading the analytics Javascript(we're also tracking clicks on an outbound link).

[EDIT]
Looking around a bit more, I found what seems to be a similar question on SO with an answer saying this can be found, automatically, but I still can't seem to find the information. The question's also old enough the respondent is probably referring to the old interface, though. Maybe someone could explain getting to it in the new look. (I won't likely be able to train this client to switch, deal with the old look, etc.)

Answer 1

Do you do server log file analysis, if so the simplest (hacky) way would be to track the requests for image content within the widget.

I had quick google and this thread seems pertinent to your problem

Answer 2

I would add a single pixel image into the HTML that that iframe is using. Check your raw access logs for each time the image has been accessed and extract the unique domains / IP's from the logs. You may be able to use the image tracking feature on getclicky.com over the javascript to have the stats in their application / interface

Answer 3

You might be able to use GA's _trackPageview, and grab the domain of the referrer via javascript(something like j=document.referrer, _trackPageview(j)) maybe.

Haven't tried that myself, but have used custom _trackPageview('Page Descriptors') before.