it's just a mnemonic device. I don't know of a name for it, there must be one, though, and can't think of how any songs could use it, except some really cheesy country and western song that sings about someone's phone number. maybe we should write one. this phenomenon is used a lot these days to advertise sex/chat lines.

how about

'you can call me at 483 7800, or just dial guest naught, naught not my real name!'