All TLDs / .mlb

What is .mlb?

The short answer
.mlb is a brand top-level domain, operated by MLB Advanced Media DH, LLC. It's a “dot-brand” registry (ICANN Spec 13) — reserved for the operator's own use, so it isn't open for the public to register. It's live in the official IANA DNS root zone.
Type
Brand (dot-brand)
Registration
Closed (brand)
In DNS root
Yes
Operator
MLB Advanced Media DH, LLC

Source: IANA root zone database, checked October 18, 2026.

Is .mlb a real domain extension?

Yes — .mlb is a real top-level domain. It's present in the official IANA DNS root zone, which is the authoritative list of every live TLD on the internet.

Who runs .mlb?

.mlb is operated by MLB Advanced Media DH, LLC, per the IANA root database.

What is .mlb used for?

.mlb is a dot-brand registry — it's reserved for MLB Advanced Media DH, LLC and isn't used for third-party websites.

Can anyone register a .mlb domain?

No. .mlb is a closed brand registry, so it isn't available for public registration. A registrar search will confirm the current policy for any specific name.