Who called from 3605399256

this is the third time this company has called my landline asking for my father by name.
the company is microsolutions. the number they called from previously is 206-388-3704
on returning their call I find both numbers have a do-not-disturb setting in use and is not accepting calls.

Yep, they called here as well. Caller ID just says Olympia, WA.  They don't leave a message.

same as above + can't call back b/c do not disturb is on

This number keeps calling and does not answer nor leaves a msg

Our TV id's the caller but our phone never rings, nor has a history of the calls.  Same here when I tried to return the call and got "do not disturb".