Wondering why I got this call from Who? Don't know anyone in Wyoming

Junk fax sender

2 PAGE FAX SPAM!!!
307-200-4010 called Aug 6, 2014 at 5:54pm.  Caller ID = OUT OF AREA (usually SPAM). No Message.
BLOCKED.

2nd Attempt
2 PAGE FAX SPAM!!!
307-200-4010 called Aug 11, 2014 at 9:25am.
307-200-4010 called Aug 6, 2014 at 5:54pm.  
Caller ID = OUT OF AREA (usually SPAM).
BLOCKED.

The caller, used  Out of area as ID,    ( From Wyoming ?) , while I was not home. When I returned the call later. It has a message to ask me to leave a message. After I heard the message the line was cut off immediately.
People reported to www.800notes.com as junk fax since 08/05/2014. We had many junk calls or  fax from Wyoming area code.
Junk fax, Caller: Out of area?