Two things you can try:
1. Ask your ad agency. If they can take care of ads in magazines, newspapers, internet, television, football stadium, well, everywhere, they should know about calling cards also.
2. Contact the issuers of calling cards (Telus, AT&T etc) and ask what their rates are.
Hi folks, I am looking for a reliable service that provides advertising on calling cards in United States. If you know any, please write to me at
info [at] ellipsissolutions [dot] com.
I'd really appreciate it!