Hint #1: If you know each of these locations then you're smarter than me! Fortunately PAT may be able to help us uncultured folk out. Is there a PAT code?

Hint #2: Putting the PAT code together looks awkward. If I follow the arrows I have the top left, top right, bottom left and bottom right. This is also the only way they can go and still form the basic pattern needed.

Hint #3: The PAT code is FED

Hint #4: Hurrah, PAT has told us what each of these locations is. But how does that get us the numbers? Well, if you happen to be extremely wealthy then you can travel to each of these locations and check them out for yourself (and if you're that wealthy, slip me a tip for these hints!). If you're not so wealthy then Google Maps and Street View works wonders. If you find google maps still doesn't work, take to Google Images and try there. The hunt is worth it!

Hint #5: Ok, I've found some of the locations but how do I get the numbers? Zoom in on the arrowed area for each location and you'll generally see numbers, or letters, or roman numerals. Look for the circled digit and take this.

Hint #6: How do I know what order the numbers go in? Well, the arrows will help you there.

SOLUTION: 8234
As a suggestion, make a note of the numbers in the recorded message in your answer.