On the Number Query and Update (NQU) page, you can enter a Toll-Free Number (TFN) that has a closed NPA or NXX code and then select the “Retrieve” button. Once the NQU information has been retrieved, select the “More Details” button. An error/warning message, “NPA-NXX is in a closed code xxxxxxxxxx (802102)” will be displayed.
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.