Short codes do not work internationally and are country-specific. For example, a US short code can only send and receive messages in the US through the carriers that approved that short code, and the same rules apply for Canada and the UK, as well as other countries that support short codes. If you need to reach a business or market internationally, make sure to do your research on that country’s short code system first, and know that there are other options such as toll-free, local numbers, and alphanumeric sender IDs depending on the country.