Last Updated: 20-August-2015
If you already know what this is simply drag the following into your browsers bookmark bar.
Basically, this one I have made strips away the URL path and the sub-domain (www.) to do a site search for "filetype:xml" which in most cases will quickly reveal the xml sitemap.
If the sitemap isn't displayed in the SERPs it means two things; either there is no sitemap or it isn't indexed for whatever reason.
You can of course keep it old school by searching for /sitemap.xml but that's a bit boring and again, not a full proof method as the URL paths change from site to site depending on where the webmaster/developer has dropped it.
If you still haven't found it you could check the robots.txt or strike it off as missing.
You've probably already noticed I don't have a sitemap - don't start! :)
About the author
Craig Addyman @craigaddyman
Head of Digital Marketing. Python Coder.