All TLDs / .mo

What is .mo?

.mo is the country-code top-level domain assigned to Macau, run by Macao Post and Telecommunications Bureau (CTT). It's live in the IANA DNS root zone. Registration is open through accredited registrars, though some country registries add local-presence or ID requirements.
Type
Country code (Macau)
Registration
Open to public
In DNS root
Yes

Registry operator: Macao Post and Telecommunications Bureau (CTT) — per the IANA root database.

Source: IANA root zone database, checked August 23, 2026.

Is .mo a real domain extension?

Yes — .mo 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 .mo?

.mo is operated by Macao Post and Telecommunications Bureau (CTT), the registry responsible for Macau, per the IANA root database.

What is .mo used for?

.mo is the extension tied to Macau. Many country codes are also used generically for branding when the letters spell something useful.

Can anyone register a .mo domain?

Generally yes — .mo is open through accredited registrars, though some country registries require local presence or ID. Availability of a specific name depends on whether it's already taken.

.mo and Macau

.mo is the country-code top-level domain assigned to Macau, administered by the registry Macao Post and Telecommunications Bureau (CTT).

.mo is the Internet country code top-level domain (ccTLD) for the Macau Special Administrative Region. It was introduced on 17 September 1992.

Source: Wikipedia — .mo (CC BY-SA)

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