The alphanumeric phone number GR2-7302 translates to 472-7302. Big deal. That's the way phone numbers were expressed until sometime in the 1960s, perhaps even into late as the early '70s in some places. Each two-letter 'exchange' usually had a word associated with it. My grandparents' phone number prefix was 787, which was the 'sunset' exchange when the number was issued in the mid '50s. How in the world people remembered all those word mnemonics, I'll never know. Of course, today we can't even remember phone numbers because we just store them in our cell phones and call them up by the person's name.