PA31 CPR PLT LANDS TUP WITHOUT CLRNC WHEN UNABLE TO FIND TWR FREQ ON CHARTS.

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HAD BEEN VFR MISSION WITH ZME FOR 2+ HRS AT COLUMBUS; MS; TURNED TO TUPELO FOR FOOD AND FUEL. HDOF FROM ONE CTLR TO ANOTHER CTR CTLR WHO CANCELED VFR ADVISORIES TO CODE 1200; 25 MI FROM TUPELO WITHOUT ANY ADVISORIES; JUST 'CONTACT TUPELO TWR.' COMMERCIAL LOW ENRTE CHART LISTS TUPELO AS CTAF 123.05. MADE SEVERAL CALLS WITH NO REPLY. WENT BACK TO MEMPHIS AND ASKED HIM TO VERIFY TWR OPERATING FREQ. CTLR WOULD NOT REPLY; EVEN WITH SECOND REQUEST. BACK TO CTAF; MADE MY CALLS 15-10 MI OUT. CHKED ASOS. WIND 170 DEGS AT 4 KTS. PLANNED L DOWNWIND TO 180. CALLED 5 MI. CHKED ONBOARD GPS FOR FREQ. COULD SET TO CALLED MENU OF FREQ OF TUPELO AND MADE CALL INTO L DOWNWIND; LOOKED FOR TFC ON GND (BOTH DIRECTIONS); EVEN LOOKED FOR A TWR LOCATION ON GND -- SO DID #2 WITH ME. CALLED BASE RWY 18; CALLED FINAL RWY 18. SHORT FINAL; SAW ACFT CLBING OUT NBOUND TURNING E AT ABOUT 800-1000 FT AGL. ALL MY LIGHTS WERE ON -- SOP. ON ROLLOUT; SAW #2 ACFT NEAR S END OF RWY AT PATTERN ALT; FLYING W TO E. TAXIED IN TO FBO AT SE OF FIELD. FIRST QUESTION WAS FREQ OF CTAF. CTLR SAID 123.05. WENT TO BATHROOM. GOT CALL FROM TWR; TRUE FREQ IS 118.77 AND GND 121.82. CALLED COMMERCIAL CHART COMPANY MONDAY AND TALKED TO CHART REPRESENTATIVE. REPRESENTATIVE SAID THAT COMPANY NEVER PUTS TWR FREQ ON CHARTS AS CTAF-ONLY UNICOM. MAP DID LIST CORRECT FREQ FOR TWR AS 118.77; BUT NOT ON FACE OF MAP. UNITED STATES TERMINAL PROCS SHOWS TUPELO AS CTAF 123.05; TWR ON 118.775. DID NOT PLAN TO STOP IN MISSISSIPPI FOR FOOD; FUEL OR BATHROOM. HAD FUEL FOR 2+ HRS. NEEDED BATHROOM STOP. ONLY FLY WITH APCH OF CENTRAL AND UNITED STATES LOW ALT ENRTE CHARTS (SUBSCRIPTION). BUY ANY UNITED STATES TERMINAL WHEN I PLAN TO LAND IN/OUT OF SVC AREA.