.by is the Internet country code top-level domain (ccTLD) for Belarus. It is administered by the State Center of the Information Security of the President of the Republic of Belarus (Государственный центр безопасности информации при Президенте Республики Беларусь).
The code "BY" originates from an alternative spelling of Belarus, Byelorussia, which was used during their inclusion in the Soviet Union. The ccTLD was created for Belarus on May 11, 1994 and replaces the Soviet domain of .su.
Since .BY enables you to protect your business online, a domain with .BY makes your web address unique and easy to memorize. A .BY extension is doing much more, helping you reach and communicate with the audience in Belarus.