I received a call from this number 8-20-2013 and after saying "hello" a couple of times, a recorded message came on saying, "goodbye" and they hung up. When I called the number back, I received a phone call saying "the number is unallocated." So, if it did belong to SMW Refrigeration & Heating, LLC (see above entry from Ann), it is now "an unallocated number." This seems a bit odd. If it is "an unallocated number" then why did I receive a call from it? Someone is obviously able to use this number.
I just received a call this morning (9/17/13) from this number (480-500-5300) shows up on caller ID as SMW. When I answered a man said" This should be an easy job tonight" and hung up. Creepy!