| Country | Alpha-2 | Alpha-3 | Dial Code | TLD |
|---|
ISO 3166 codes are internationally recognized codes for countries and dependent territories. Alpha‑2 codes (e.g., US, GB) are used for top‑level domains and international vehicle registration. Alpha‑3 codes (e.g., USA, GBR) are used in machine‑readable passports. Dial codes are the international calling prefixes.
ISO 3166 is the international standard for country codes. Alpha‑2 codes are two‑letter codes (e.g., US), Alpha‑3 are three‑letter (e.g., USA).
Dial codes are the numbers you dial before a national number when calling internationally (e.g., +1 for US/Canada).
Top‑Level Domain, the last part of a domain name (e.g., .us, .uk). Usually matches the Alpha‑2 code.