Who called from 5637737339

no message, no id, no answer on callback - get message saying "this number is busy now".

Calls on my cell phone even after I've registered with DNC.  I'm not answering.

i've received two missed calls and no message from this number as well.

Called, started to go into a schpel and I asked what company this was and they hung up on me.  my phone is registered with DNC registry.

I just received a call on my cell (8-25-08) and it was a recording ALL in spanish. Unfortunately I do not speak the language but I know it told me to push #1. Hung up instead. MUST be a dialer because I called back and it said "all circuits are busy now."