Form 477 Data: ZIP Codes by Number of Non-ILEC Interconnected VoIP Providers and CLECs

As of 12/31/12 (PDF). Posted 11/13. 
As of 6/30/12 (PDF). Posted 6/13. 
As of 12/31/11 (PDF). Posted 2/13.  
As of 6/30/11 (PDF). Posted 6/12.  
As of 12/31/10 (PDF). Posted 10/11. 
As of 6/30/10 (PDF). Posted 03/11. 
As of 12/31/09 (PDF). Posted 01/11.  
As of 6/30/09 (PDF). Posted 09/10.  
As of 12/31/08 (PDF). Posted 07/10.