i have a toronto phone number from 1992 with an address but am looking
for the name of the person in whose name it was listed.

The best place to look will be the Mights Directory at the North York
Central Library.  They have back issues of the reverse directory in
print, which will allow you to check information by address and phone
number.  They are located at
5120 Younge St. Toronto, ON. Phone: 416-395-5535 (Wheelchair
Accessible) Hours are Mon. 12:30-8:30 Tues - Thurs. 9:00-8:30,
Fri.9:00-5:30, Sat. 9:00-5:00 and Sun. 1:30-5:00.

Please see the library's website if you need more contact information
http://www.tpl.toronto.on.ca/.

I hope this helps, lisaradha

Try anywho.com . That might not help for Toronto, but maybe it will.