file extension 400 - Designer graphics file
File type specification:
File type data not available.
Extension icon: 
.400
File extension 400 description:
File extension 400 entry has not yet been fully verified by File-Extensions.org team. It was added in the past to our library and appeared to be accurate.
If you know more or some useful information about 400 file extension, please send us a message by clicking on submit extension button at the top of page.
.400