Narrative:

I departed chino VFR and planned to pick up an IFR in VFR conditions back to burbank. On initial climb, I turned towards pomona VOR to stay clear of la TCA. I contacted ontario approach on the wrong frequency for that route of flight. The correct frequency is 125.5, I called on 135.4. If you look at the TCA chart, 135.4 looks as if it is the proper frequency for that area. I did however make radio contact with the controller who used my north number and informed me that I was on the wrong frequency and suggested 125.5. When I called 125.5, the controller was busy talking to an airliner (name of which I can't recall) and was asking the airliner if he could identify me. I immediately idented myself to the controller who informed me I was not where I was supposed to be. I informed the controller of my mistake of contacting the wrong frequency. He told me to 'read my map better' and that was all. I also asked for a squawk code back to burbank, and was given one. I realize my mistake, but as a suggestion, you might want to make the arsa altitude 50/27 larger on the chart, and put the 125.5 sector frequency closer to chino or put an additional 125.5 frequency between chino and pomona VOR. I have discussed this situation with the other CFI's and they also believe this is an easy situation to stumble into.

Related reports:

Google
 

Original NASA ASRS Text

Title: PLT ATTEMPTING TO CONTACT DEP FOR CLRNC THROUGH ARSA WAS TOLD WRONG FREQ. WHILE CONTACTING SECOND FREQ CLBED ABOVE ARSA FLOOR.

Narrative: I DEPARTED CHINO VFR AND PLANNED TO PICK UP AN IFR IN VFR CONDITIONS BACK TO BURBANK. ON INITIAL CLB, I TURNED TOWARDS POMONA VOR TO STAY CLR OF LA TCA. I CONTACTED ONTARIO APCH ON THE WRONG FREQ FOR THAT RTE OF FLT. THE CORRECT FREQ IS 125.5, I CALLED ON 135.4. IF YOU LOOK AT THE TCA CHART, 135.4 LOOKS AS IF IT IS THE PROPER FREQ FOR THAT AREA. I DID HOWEVER MAKE RADIO CONTACT WITH THE CTLR WHO USED MY N NUMBER AND INFORMED ME THAT I WAS ON THE WRONG FREQ AND SUGGESTED 125.5. WHEN I CALLED 125.5, THE CTLR WAS BUSY TALKING TO AN AIRLINER (NAME OF WHICH I CAN'T RECALL) AND WAS ASKING THE AIRLINER IF HE COULD IDENT ME. I IMMEDIATELY IDENTED MYSELF TO THE CTLR WHO INFORMED ME I WAS NOT WHERE I WAS SUPPOSED TO BE. I INFORMED THE CTLR OF MY MISTAKE OF CONTACTING THE WRONG FREQ. HE TOLD ME TO 'READ MY MAP BETTER' AND THAT WAS ALL. I ALSO ASKED FOR A SQUAWK CODE BACK TO BURBANK, AND WAS GIVEN ONE. I REALIZE MY MISTAKE, BUT AS A SUGGESTION, YOU MIGHT WANT TO MAKE THE ARSA ALT 50/27 LARGER ON THE CHART, AND PUT THE 125.5 SECTOR FREQ CLOSER TO CHINO OR PUT AN ADDITIONAL 125.5 FREQ BTWN CHINO AND POMONA VOR. I HAVE DISCUSSED THIS SITUATION WITH THE OTHER CFI'S AND THEY ALSO BELIEVE THIS IS AN EASY SITUATION TO STUMBLE INTO.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.