New answers tagged debugging
You can use https://geopeeker.com/, http://www.webpagetest.org to see how it appears from different locations of the world.
No, that is not possible. I'd recommend renting a cheap VPS in your target client area and then proxying your test requests through that server. That said, if you examine your logs, you will see the exact links requested when clients receive the 404 errors. Then you'll have a better understanding of what's going on.
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