The TIFF Page Counter COM Component link will start or launch the vendor software form.

The com component will quickly tell you how many pages are in a tiff file, ideal for web sites that serve tiff content.
Example .asp code included

simple ASP example of usage:-

Set Obj = Server.CreateObject(TIFFPAGECOUNTCOM.CTIFFPageCount.1)
dim pages
pages = Obj.GetPages(C:yourtif.tif)