Now You can check for free if Your device is on Blacklisted in USA.
Verify that the IMEI is Clean or stolen. If you are going to buy a used phone, make sure that it has not been reported as lost or stolen and the IMEI number is not blacklisted.

Check IMEI below and get result in few seconds:
USA carriers blacklist check

Sample result:
Model Number;IPHX64GBGRY1
Description;IPH X GRAY 64 SGL
Poc Swap;False
Contract Status; Pending Balance
ESN Hex;35485809838xxx
Account Status;(Phone owner account ID mismatch FED not met)

See More: BlackList USA carriers check