What Is a Country Code?
Country codes in daily use
A country code is a short identifier assigned to a country or territory. The most visible kinds are the ITU-T calling code such as +44, the ISO 3166-1 alpha-2 code such as GB, and the ccTLD such as .uk.
Each identifier serves a different system: phone networks, international data standards, and the internet. That is why one country can have several codes that all refer to the same place.
Where country codes come from
Calling codes are coordinated by the International Telecommunication Union, ISO codes by ISO 3166-1, and ccTLDs by IANA. Each registry publishes the authoritative assignments and keeps a public list.
The World Lookup Hub combines those registries with public reference data so a single search can return the complete set.
How to look one up
Use the universal search on the homepage. Enter a country name, calling code, ISO code, TLD, or currency code, and the result links to the matching country page.
Country pages show the calling code, ISO alpha-2 and alpha-3, numeric code, ccTLD, currency, time zones, postal format, and related airports.