Data methodology
Methodology
Each public data page links its sources and shows the static data snapshot used for the build.
Country, language, and phone data
Country and territory records use ISO 3166-1. Language and locale recommendations use Unicode CLDR. Phone formatting metadata is presented with ITU-T E.164 and libphonenumber as the public references.
Identity-format threshold
An identity-format page is listed only when it has an official public source, or when two independently reviewed professional references agree. The site shows a regex and a permanently masked synthetic example, never validation or a usable identity value.
Data provenance