PIPER PA28 PLT INADVERTENTLY FLIES THROUGH PROHIBITED AIRSPACE NOT KNOWING THAT THE AIRSPACE HAD BEEN TEMPORALLY EXPANDED.

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I PLANNED A 2 LEG FLT HOME FROM ZZZ TO ZZZ1. I USED THE COMMERCIAL LOW ALT ENRTE CHARTS; SECTIONALS AND WAC. THIS WAS TO BE THE RETURN TRIP OF THE 1ST REAL DISTANCE CROSS COUNTRY FLT; FOR THIS LOW TIME PRIVATE PLT. INSTEAD OF CALLING THE WX BRIEF NUMBER; I USED THE ON LINE DUATS SERVICE. THE SECOND LEG OF THE FLT WAS IN PART; USING V39 AIRWAY INCLUDING FROM MRB VOR TO LRP VOR. I NOTED THE R-4009 AIRSPACE N OF V39 AND IT SHOWS THE AIRWAY CLEARS THAT AIRSPACE ON ALL CHARTS. AT OR ABOUT XA00 HRS TO XA41 HRS I WAS FLYING AT 5500 FT MSL (500 FT ABOVE THE LISTED P40) ON THE NE RTE OF V39 FROM MRB TO LRP. APCHING WHAT I BELIEVED TO BE A CLR AIRWAY AROUND WHAT I THOUGHT WAS R-4009 (S E OF AND 500 FT ABOVE THE CHARTED P40 CEILING).WHILE CLOSING IN THE AREA I ALSO USED THE GPS TO FLY EVEN FURTHER TO THE S E OF V39 BY MORE THAN A MILE; THINKING I WAS CLRING THE R-4009 AREA BY A WIDE MARGIN OF SPACE. I CONTINUED THE FLT HOME TO ZZZ1. UPON LNDG; THE GND CTLR RADIOED ME TO COPY A PHONE NUMBER AND CALL AS SOON AS ABLE. WHILE THE PLANE WAS BEING FUELED I MADE THAT CALL FROM THE FBO. I WAS GIVE ANOTHER NUMBER TO CALL. I HAD TO WAIT TO GET HOME TO MAKE THE LONG DISTANCE CALL. I SPOKE WITH A SPOKESMAN WHO EXPLAINED THAT THEY BELIEVED I HAD VIOLATED AIRSPACE AND TOOK MY INFO. WHEN I STATED THAT I BELIEVED I WAS CLR OF THE AIRSPACE; HE STATED THAT THE AREA WAS EXPANDED TO A 12 MILE RADIUS BY NOTAM. IN HIND SIGHT I SHOULD OF CALLED THE WX BRIEF NUMBER IN ADDITION TO USING THE ON LINE DUATS. I TRIED TO READ ALL THE ITEMS PRINTED FROM DUATS; BUT THERE WAS MORE THAN 35 PAGES OF INFO. LOOKING OVER THE NOTAMS AFTER I FOUND THE ONE FOR THAT AREA. THE NOTAM DID NOT PLAINLY STATE THAT THE P40 AREA OR THE R-4009 AREA OR THE AREA OF V39 WAS AFFECTED WAS NOW AN EXTENDED TFR FOR AN 8 MILE RADIUS FROM THE CENTER OF R-4009/P40. I WAS ONLY GIVEN IN LAT AND LONGITUDE. THE WORDING LEAD ME TO BELIEVE THAT THIS WAS ALL IN THE WASHINGTON CLASS B AIRSPACE OF WHICH I WAS GOING TO BE WELL N W OF. ANOTHER CONTRIBUTING FACTOR WAS NOT TO HAVE USED FLT FOLLOWING. I HAD SLIGHT INTRODUCTION WITH FLIGHT FOLLOWING AND PROCS DURING TRAINING OVER TWO YEARS AGO. THUS MY RELUCTANCE TO USE THE SYSTEM AND PLANNED THE FLIGHT ABOVE AND AROUND CTRL/RESTR AIRSPACE. MY FLTS UP TO THIS POINT HAD BEEN LCL WITHIN A 100 MILES. ALSO; I DID NOT FILE A VFR FLT PLAN DUE THE GREAT WX. IT HAS BEEN A LONG TIME SINCE THE 09/TUE/01 EVENT THAT THE R-4009/P40 AREA SHOULD HAVE BEEN MADE PERMANENT AND DISPLAYED ON ALL CHARTS. THE V39 AIRWAY SHOULD HAVE BEEN MODIFIED AND PLACE IN AN AREA THAT IS OUTSIDE OF PROHIBITED AIRSPACE.