Even though I have a block on "unknown" or "anonymous" or numbers listed as "private", I don't know how this one got through.
Repeat call, several times, to the point I don't even answer the phone.  The first couple of times I answered but nobody replied, so I quit.  
It says the caller is from Delaware, and I don't know anybody from there.  Fact is, most of the calls I get or used to get since I blocked calls, is from the east coast.

I just got a call from this number as well and no one wanted to say anything.  I hung up and they called back six times in a row.  The last time they called I blew a police whistle into the phone as hard as I could.  That was 30 minutes ago...hopefully they're now too deaf to call me back  :)

The lady said she was from gsa about a 5 year contract.