How can a USA radio station be heard in Canada?

One of old phones had a radio app and it used to catch this station that was based in Los Angeles. I used to listen to this podcast every night in Toronto. I'm wondering how that was even possible. There's Toronto based stations that I can't listen to when I get even a bit out of Toronto, so how did... show more One of old phones had a radio app and it used to catch this station that was based in Los Angeles. I used to listen to this podcast every night in Toronto. I'm wondering how that was even possible. There's Toronto based stations that I can't listen to when I get even a bit out of Toronto, so how did this one work?
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