unknown signal

Hi ya'll, I've got a mystery signal I've been unable to identify as of yet. Unfortunately, I've only got the audio recording to work from now. Picked up in San Diego county area on 447.3225MHz, bandwidth of approx. 6k. Based on the audio, I think it's a 4-tone FSK, but my ears aren't that great...

I received what appears to be an FSK signal just above 124kHz. I have this small air-core magnetic coil antenna (not one tuned for LF or VLF reception, but it's useful for picking up near-field VLF and LF magnetic signals like holding it near a switching supply and picking up its electronic...