re: IVOC/VTPI - In May 1999, International Voice Technologies, Corp., a Delaware corporation, merged with and into Visual Telephone (which in the interim had changed its name to Visual Telephone International, Inc.), with Visual Telephone surviving. Simultaneous with the merger, Visual Telephone changed its name to iVoice.com, Inc..
There was no reverse split. I know, I bought VTPI right before the merge and it ran from the the teens to like .80