Something burned into my brain is "call 836-7000 or visit transitchicago.com" which was an announcement that played seemingly every 30 seconds on CTA buses back when I lived there. I was in California once and tried 312-836-7000 as the loyalty card phone number at Safeway and it worked. So I guess I'm not the only one. (847- 773- etc. would probably also work. That's why I thought the message was so cool... they got the number in every Chicagoland area code!)
I have shared this story on Reddit before and I got banned from r/AskReddit for "doxing". That phone number is super secret and must not be publicized! Whoops!