This number calls at early morning hours and only gives a message "To accept, press 1, to leave a message, press 2". Search reveals it is Bethesda MD.
Another number, with the same message has called at 2am and 4am prior to this number now calling at 5am. The other number comes up as "unknown" on caller ID but is untraceable due to it having too many numbers: 2348051081780.
The calls are coming more and more each morning and very annoying.