On the Numbering Plan Area (NPA) Code Opening / Overlay Information (NCO) page, enter a valid NPA and select the “Submit” button.
The Results portion of the retrieved NCO page for the new NPA will be displayed with the following fields:
- Open-X Date
- Open Date
- Old NPA
- Common Channel Signaling (CCS) Network
A message, “NPA Code Opening / Overlay Retrieved Successfully” will be displayed at the top of the page.
Disclaimer: Any images in this article are intended to be used as a guide for educational purposes only and they may differ slightly from the Production Environment.