cobb87,
I can only hear the pilot's responses. I can't hear what NY Center is saying.
The LiveATC "ZNY New York Center (JOBOC Sector)" feed covers this sector. You should be able to hear the controller there.
Note to LiveATC - the archive function seems to be turned off on this feed. Any chance of getting it back on ?
After New York Center you should be able to hear them get their initial HF frequency assignment from ARINC on 129.90, this is covered on the LiveATC "ARINC (JFK/LGA Area)" feed. There are a few LiveATC feeds that cover some of the New York HF frequencies.
After that the HF frequencies are usually assigned using CPDLC (via SATCOM). You might catch some of their CPDLC transmissions using this site.
http://dev.satradar24.com/teste_jonis/#/databaseThere is a worldwide network of tuneable HF radios here that you can use to maybe catch them as they cross each ATC FIR boundary for a selcal check on HF.
https://www.sdr.hu/Does anyone have a link that shows ATC boundaries on this route?
Copy the route from flightaware and paste it into the Flight Plan box on Skyvector and it will show the whole route and the ATC FIR boundaries.
https://flightaware.com/live/flight/SAA204SHIPP JETZZ BLUUU DUMPR ISLES KAYYT 3600N/06000W 3400N/05500W 3230N/05000W 3100N/04500W 2800N/04000W 2500N/03500W ULTEM UR976 GAMBA UR976 CVS UA602 MOGSA UA602 TITOR UG853 DEMAR UR991 VONAS ARLEM 0000N/00720W EMTAL GAPEL APNUK AVIGI UDMON DIMIX IBLOK UL435 GBV ETOSA UZ10 PEDIL UQ19 AVAGO AVAGO1C
https://skyvector.com/JS