Canadian call sign look up is very useful and comprehensive.
QRZ is the main available Callsign database with 102,000 callsigns and information immediately available.
THE BUCKMASTER CALLBOOK is a another useful site if you are searching for amateurs with callsigns. Much information is available and you can update at any time to include other personal information such as e-mail address, telephone/fax numbers etc. It is a fast-operating database with much more to offer.
DX ZONE are building up quite a nice list of amateur radio names and addresses (individuals and Clubs) and are worth an occasional visit. We have added their Search interface to our Electronic Facilities area, so if you are interest return to our home page via the navigation bar below.