FileInfo.com - The File Extensions Resource

.IB File Extension

File Type	InterBase Database
File Format	File
Common?	No
File Description	Database file created with Borland InterBase; default extension used by InterBase 7.0 and later
Program(s) that open ib files	Windows: Borland InterBase 7.0 or later

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/ib