AN ACR FLC FLYING L1011 INTO HNL FAILS TO CHANGE RADIO FREQ FROM APCH TO TWR RESULTING IN LNDG WITHOUT A CLRNC.

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WE WERE CLRED FOR A VISUAL APCH. NO OTHER TFC ON RWY THROUGHOUT OUR APCH; OR WITHIN 5 MI OF OUR POS WHILE INFLT. APCH CTLR DID NOT HAND US OFF TO TWR. WE REALIZED THIS JUST AFTER LNDG AND TURNING OFF OF RWY. THUS; NONE OF US WERE CERTAIN AS TO WHETHER OR NOT WE ACTUALLY RECEIVED LNDG CLRNC. WE CONTACTED THE TWR (SWITCHED TO TWR FREQ) AFTER CLRING RWY AND THEY TOLD US TO CONTACT GND FOR TAXI. THEY DID NOT SAY ANYTHING ELSE OR IMPLY BY THEIR TONE OVER THE RADIO THAT ANYTHING WAS AMISS OR THAT THERE WAS A PROB; THUS OUR UNCERTAINTY GREW. PROB AROSE BY OUR CREW NOT NOTICING THE LACK OF A HDOF TO THE TWR BY APCH CTL. THE CONTRIBUTING FACTORS WERE THE LACK OF A HDOF INSTRUCTION FROM APCH CTL. NO TFC IN THE AIR OR ON OUR LNDG RWY COMBINED WITH CLR DAYTIME WX MAY HAVE CAUSED COMPLACENCY IN THE COCKPIT DURING OUR APCH AND LNDG. IT WAS DISCOVERED BECAUSE NO ONE TALKED TO US IMMEDIATELY AFTER CLRING THE RWY AND STOPPING. LOOKED AT THE RADIO PANEL AND SAW THAT WE WERE STILL ON APCH FREQ. IT WAS AT THAT POINT THAT WE SWITCHED TO TWR FREQ AND CONTACTED THEM WHO IN TURN INSTRUCTED US TO CONTACT GND FOR TAXI. CORRECTIVE ACTIONS: WE DEBRIEFED AT THE GATE. TO PREVENT THIS OCCURRENCE IN THE FUTURE WE DECIDED AS A CREW TO ADD 'CLRED TO LAND' TO OUR STANDARD COMPANY MANDATED CALLOUT AT 1000 FT AGL OF '1000 FT LNDG FLAPS 33 DEGS/42 DEGS SET.' THIS OF COURSE PROVIDED THAT WE ARE IN FACT CLRED TO LAND. I FLEW AGAIN WITH THE SAME CAPT AND GOT A CHANCE TO IMPLEMENT THIS CORRECTIVE ACTION. THIS CHANGE OF CALLOUT SHOULD ENSURE CLRED LNDGS IN THE FUTURE.