ISO 3166-1
🇭🇲 Heard Island and McDonald Islands
· filed 2026-07-18 · click a code to copy
🇭🇲Heard Island and McDonald Islands (officially: Heard Island and McDonald Islands) is filed in ISO 3166-1 under alpha-2 code HM, alpha-3 code HMD and numeric code 334. Its international dialing code is and its country-code top-level domain is .hm. Region: Antarctic.
Currency: AUD (Australian Dollar).
The two-letter code appears in domains, locales (like en-HM), shipping and licence plates; the three-letter code in passports, finance and sport; the numeric code where Latin script is unavailable.