Change Order A (PDF)
On June 28, 2019, the FCC approved Change Order #A - INC Issue 839 - Combine the Central Office Code (NXX) Assignment Guidelines (COCAG) and the Thousands-Block (NXX-X) Administration Guidelines (TBPAG) into one Document. Implemented on October 30, 2019.

Change Order 8 (PDF)
On March 22, 2019, the FCC approved Change Order #8 - INC Issue 869 - NPAC HelpDesk information is incorrect on system generated TBPAG Part 1B form. Implemented on May 16, 2019.