Caller ID said "Commercial Bldg" I didn't answer - Looked up the phone number and it is unlisted.

This number calls an average of 3 times a week.  They leave no message and when returning the call and get a message saying, This number has been disconnected.  This is a recording".  Yet, the calls keep coming.
Supposed this number is Commercial Building Maintenance in Peoria, AZ

This caller calls me during the day and after 6pm with the caller ID listing of "Commercial Building Maintenance" which whose address comes up in Peoria, AZ.  A generic search of the address, 8020 W Beaubien Dr Peoria, AZ 85382 shows as both commercial and residential.  I also called the number back as another poster did, and while the number was still ringing I received the message that the number was no longer in service.  I even tried back again and got the same recording.  
I swear, ever since I renewed my participation in the "Do Not Call" registry about 8 months ago I have been bombarded with more calls than ever!!

Every day for the last 8 days they call, The address listed to that number is 8020 W Beaubien Dr Peoria, AZ 85382  but they also list another number at the same address which is; 623 362-0748 which when I call I get same message that the number is not in service. This address is registered to Wes Whaley and Santos Vargas. - I too get more nuisance calls since I registered with the do not call registery.

CALLS ALMOST EVERYDAY.  LEAVES NO MESSAGE.