OPERATING IN MULTIPLE FOREIGN AIRSPACE; A CTLR FROM ONE COUNTRY RECEIVED FLC POS RPT AND HAD THEM CHANGE FREQ TO THE NEXT COUNTRY CTLR. HOWEVER; THE CTLR FAILED TO PASS ON TO THE NEXT CTLR THE FLC'S POS RPT. CONSEQUENTLY; THE ACFT CROSSED THE FIR BOUNDARY AND THE CTLRS FROM THE NEXT COUNTRY HAD NO INFO ON THE FLC ACFT.

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WE WERE OPERATING AS ACR X FLT YY; A DC10-30F FREIGHTER. WHILE IN LEVEL CRUISE ON A TRIP FROM EGSS TO SBKP; WE MADE A STANDARD NON-RADAR POS RPT OVER 'KONBA' INTXN TO CASABLANCA CTL. CASABLANCA CTL ACKNOWLEDGED OUR REPORT. APROX 10 MINS LATER; CASABLANCA GAVE US A FREQ CHANGE TO CANARIES CTL. WE THEN GAVE CANARIES CTL THE SAME POS RPT WE HAD JUST MADE TO CASABLANCA. THE NEW CTLR ACKNOWLEDGED OUR RPT AND GAVE US A DISCRETE CODE TO SQUAWK. AFTER SEVERAL MINS THE CTLR INFORMED US THAT WE WERE IN RADAR CONTACT. SHORTLY THEREAFTER; WE WERE ADVISED TO CONTACT ANOTHER CTLR (POSSIBLY THE SUPVR) WHO WANTED TO TALK TO US ABOUT A PROB. THIS NEW CTLR ASKED US WHY WE HAD FLOWN 150 MI INTO CANARIES AIRSPACE WITHOUT CHKING IN ('KONBA' INTXN IS THE CANARIES IFR BOUNDARY). HE FURTHER STATED THAT 'YOU WERE LUCKY WE HAD YOU IN RADAR CONTACT.' WE RESPONDED THAT WE HAD MADE ALL NORMAL FREQ CHANGES AND RPTS. I ALSO ASKED THE FIRST CTLR IF HE HAD RECEIVED ALL OF OUR POS RPTS AND ESTIMATES. HE ACKNOWLEDGED THAT HE HAD; AND DIDN'T SEEM TO THINK THAT THERE WAS ANY PROB. I BELIEVE WHAT HAPPENED IS THE FOLLOWING. OVER 'KONBA' CASABLANCA FAILED TO HAND US OFF TO CANARIES CTL AFTER WE MADE OUR POS RPT. WE DID NOT QUERY HIM ABOUT THIS. ONCE HE REALIZED HIS MISTAKE HE GAVE US THE FREQ CHANGE. BY THAT TIME; WE HAD FLOWN A NUMBER OF MI INTO THE CANARIES AIRSPACE. UNLIKE SOME FIR BOUNDARIES AROUND THE WORLD; THE ENRTE CHARTS FOR THIS AREA DO NOT INSTRUCT US TO CONTACT CANARIES CTL PRIOR TO XING THEIR BOUNDARY. OUR SUGGESTION IS TO HAVE THIS INFO PRINTED ON THE ENRTE CHART. I NEVER BELIEVED WE WERE IN DANGER AT ANY TIME; BUT THE POTENTIAL IS ALWAYS LURKING THERE.