B777 LANDS AT JFK WITHOUT A CLRNC.

Narrative

ON A 4 PLT FLT FROM ZZZZ-JFK; WE WERE GIVEN VECTORS AROUND JFK FOR A CHANGE OF APCH FROM ILS RWY 31R TO ILS RWY 4R IN IMC CONDITIONS. THE CAPT WAS PM AND THE FO WAS PF. THE ATIS CALLED FOR 6 SM WITH HAZE; 1200 FT BROKEN; WINDS 130 DEGS/3 KTS. THE LAST CLRNC WAS FROM JFK APCH 'TURN TO 020 DEGS; MAINTAIN 1500 FT; CLRED ILS RWY 4R APCH.' THE CHKLISTS WERE COMPLETED PRIOR TO 1000 FT MSL. THE APCH WAS CONTINUED AS I WAS WATCHING FOR THE LIGHTS ON THE GND. I HAD A SIGHTING AT 800 FT; THEN OBSCURED UNTIL AROUND 550 FT MSL. THE VISIBILITY WAS AROUND 4 SM. AS THE LITANY FOR 500 FT WAS ANNOUNCED; I ASKED IF WE HAD BEEN CLRED TO LAND. THE CAPT ASKED AND WE WERE GIVEN 'CONTACT TWR ON 118.1;' HEARD BY ALL 4 PLTS. AS THE CAPT (PNF) WAS TRYING TO GET LNDG CLRNC; THE FO (PF) WAS IN THE FLAIR; TOUCHED DOWN; AND CAME TO A STOP. ON THE RWY; WE DECIDED THE CORRECT FREQ WAS 119.1. TWR ASKED IF WE COULD HEAR HIM; WE REPLIED AFFIRMATIVE; AND THEY GAVE US TAXI INSTRUCTIONS OFF THE RWY; TURNED US OVER TO GND AND WE PROCEEDED TO TAXI TO OUR GATE WITH NO FURTHER INCIDENT. THERE WAS NO DISCUSSION FROM THE TWR ABOUT THE LNDG AND WE DID NOT BRING IT UP. THERE WAS NO ONE IN FRONT OF US ON THE RWY AND NO ONE CLOSE TO US BEHIND. IT WAS A DECISION TO LAND INSTEAD OF GOING AROUND SINCE WE HAD BEEN FLYING A LONG TIME; THE WX WAS BAD; THE VISIBILITY AND CLOUD COVERAGE WAS LOWER THAN RPTED; AND THERE WAS NO APPARENT CONFLICT ON THE RWY. IN RETROSPECT; WE ALL HAD KEYS TO CHK FOR LNDG CLRNC BUT WERE FOCUSED ON THE WX. IN OUR DEBRIEF; WE ALL DECIDED THAT WE MUST STICK TO OUR HABITS; BACK EACH OTHER UP AS IF WE WERE EACH ACTIVELY FLYING; AND DON'T ASSUME THINGS WERE DONE WITHOUT QUESTIONING. THERE WAS GOOD INTERACTION BTWN US AND NO PROB WITH POINTING OUT MISCOMS OR RTE/DIRECTION CHANGES.