What is typically the first site(s) an USA-inbound transatlantic flight communicates with? Specifically for East Coast destinations.
I’m unsure exactly what you are asking, but following HF comms over the ocean, usually their first VHF contact is with a Canadian ATCC.
The ATC’s are either New York Oceanic (US) or Gander Oceanic (Canada), depending of the route’s latitude.
Live ATC feeds on the HF over Atlantic:
Perfect, thank you kindly.