120.125 Hyannis MA (HYA) RCAG
At this point we have not been able to determine if this is a new sector 17 frequency replacing 133.450 MHz paired with 269.300 MHz or if they have split low/high VHF frequencies for the sector into 120.125/133.450 respectively.
This frequency will be included in the next edition of our new e-book the North American Enroute Aviation Guide available on Amazon.com for $2.99US.