It's one more letter than a suffix, but as a prefix its a bit clearer. I've known companies to post LAN hostname addresses that way, and in written/printed materials it stands out pretty clearly as an address to type.
It follows the URL standards (no schema implies current or default schema). Many auto-linking tools (such as a Markdown, Word) recognize it by default (though sometimes results are unpredictable given schema assumptions). It's also increasingly the recommendation for HTML resources where you do want to help insure same-schema requests (good example cross-server/CDN CSS and JS links now are typically written as //css-host.example.com/some/css/file.css).
It follows the URL standards (no schema implies current or default schema). Many auto-linking tools (such as a Markdown, Word) recognize it by default (though sometimes results are unpredictable given schema assumptions). It's also increasingly the recommendation for HTML resources where you do want to help insure same-schema requests (good example cross-server/CDN CSS and JS links now are typically written as //css-host.example.com/some/css/file.css).