Anyone holding an
FCC amateur (or marine) license must also have an FCC Registration Number, or
FRN, which you get by signing up via CORES, the Commission Registration System.
The FCC is encouraging all prospective licensees to get an FRN before taking the license exam.
The CORES website
was updated on March 1 and there are new procedures for signing up. The FCC has
produced a how-to video on using the new system. It's available online at
<https://youtu.be/7a4doKEPN5M>. (Tnx WW2I)