There are a [/i]ton[/i] of Castlevania games stuffed into that time period. In IGA's canon, there are Order of Ecclesia, Bloodlines, and Portrait of Ruin. That period also includes Legacy of Darkness/Castlevania 64 and Circle of the Moon. There are also the events of Bram Stoker's original Dracula novel, which are semi-canonical to the series. There was going to be that Castlevania Ressurection (sort of, it had a Belmont from the 19th century), but that was cancelled and a game key to it was stricken from canon. It would have explained the whole "Belmonts are forbidden from using Vampire Killer" thing, too.
Post-Dawn of Sorrow is also tricky since that is still in the future. Castlevania isn't exactly Mega Man where you can comfortably set games five hundred years from now.