Called twice withing five minutes.  The first time the caller ID read "PHLDLPHZN1PA"; the second time the caller ID read "Unavailable"  There was no response from the caller, just a beep (as from a fax line).  An attempt to call back reached a recording: "Your call cannot be completed as dialed.  If you feel you have reached this recording in error, please check the number and dial again."

Fax advertising govt. requires safety training. RIP OFF ATTEMPT

keep calling but not leave message, and unavailable when call back.

This number called into my home twice this morning while I was out.  CID shows 'unknown name'.  They did not leave a message.

Called 3 times between 8:30-9am, didn't leave message