Google Search Operator – site:example.com -inurl:www

Adding [-] to most operators tells Google to search for anything but that particular text. In this case, by separating out “inurl:www”, you can change it to “-inurl:www” and find any indexed URLs that are not on the “www” sub-domain. If “www” is your canonical sub-domain, this can be very useful for finding non-canonical URLs that Google may have crawled.