Sh1n (Dave) (@hey_itsmyturn) reposted a report from Faytuks Network (@FaytuksNetwork) stating that the FAA ground stop has expanded to a nationwide scope.

The ground stop is now nationwide, covering all centers and all destinations until further notice, due to widespread frequency outages.

The reposted update quotes an earlier Faytuks Network alert:

BREAKING: The FAA has issued a national ground stop across the United States

The posts do not provide additional details on the scope, duration, or the specific systems affected by the reported frequency outages.