What Is .mil?
The .mil domain is a sponsored top-level domain exclusively reserved for the United States Department of Defense and its affiliated organizations. The name is derived from 'military.'
Like .gov and .edu, .mil is not available for commercial registration. It represents one of the original TLDs from the internet's early infrastructure.
Understanding .mil is mainly relevant for context — knowing which TLDs are restricted helps you understand the broader domain landscape.
Why This Matters for Startups
You cannot register a .mil domain commercially. If your startup serves defense or military clients, your credibility will come from contracts, certifications, and references — not from your domain extension. Use .com or .io for your public-facing website.
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