If you’ve been licensed
for more than six years, you will probably want to update your FCC CORES (COmmission
REgistration System) file to move it to the commission’s updated system. The ARRL
Letter reports that use of the new system is now mandatory and that the legacy
system was retired as of July 15. This is the system that keeps track of your
licensing records and issues your FRN, or FCC Registration Number, without
which you can’t do business with the FCC’s computers. The updated system may be
accessed at <https://apps.fcc.gov/cores/userLogin.do>.