.cx

.cx is the country-code top-level domain for Christmas Island, an Australian external territory in the Indian Ocean. IANA lists Christmas Island Domain Administration Limited, or cxDA, as the ccTLD manager.

The extension is also used internationally because its two letters can fit abbreviations, technology names and short brands. That creative use does not change its technical status as Christmas Island's country-code domain.

cxDA's current Registrant Agreement permits registration by an identifiable adult individual or a legally recognized entity, subject to the registry's eligibility, acceptable-use and accurate-data requirements. The registry also maintains specific rules against abusive or prohibited uses.

For a Christmas Island-related project, .cx provides a direct geographic identity. For a global brand, users may instead read the letters simply as part of the name.

VYR classifies standard .cx registration as open, while noting that registrants remain subject to cxDA's own policy framework rather than the standard gTLD rules.