Who called from 2166723760

7/18/16 4.11pm.

Received 2 calls and voicemails within a minute - voicemail messages were blank, just some static-y background noise.

Called left ambiguous message about warranty going to expire. If we don't hear from you well put away your file. No name, company or item given.

Robo call.
"Hi! This is josh from the service department, can you hear me okay?..... Great,  blah.....blah.....blah....

I'm on national do not call registry. Keep getting call from this number. Blocked the caller but they keep getting through on my iPhone somehow!  How is that possible?? They leave no message.