New York Center has transmitters/receivers located here in Bermuda, to cover transoceanic flights as well as flights to & from Bermuda (TXKF).
All flights within 180-NM of Bermuda must contact & be controlled by New York Center on 128.5
Inbound traffic to Bermuda is eventually switched over to New York Approach on 119.1 when closer to the island.
Bermuda Airport's airspace is Class D, and extends out 5-NM and up to 2,500'. Anything outside & above that is controlled by New York Center. Most departing flights are already switching over to New York Center while their gear is still retracting and they're still over the runway.
I hope to have my feed up within a couple of weeks, providing that when my equipment arrives I can get pretty good reception. I don't know what the exact proportion is, but the majority of radio traffic would be New York Center communicating with high-fliers transitting our airspace.