STUDENT PLT ON FIRST XCOUNTRY FLT FEARS THAT ACFT MAY HAVE ENTERED THE NORFOLK; VA; CLASS C AIRSPACE WITHOUT PERMISSION. ACFT'S ALT WAS CLOSE TO THE BASE OF THE CLASS C AIRSPACE AND ORF APCH CTLR FREQ WAS NOT BEING MONITORED.

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I WAS DEPARTING FROM NEWPORT NEWS ARPT FOR THE LAST LEG OF MY SOLO XCOUNTRY FLT BACK TO NGU. THE PHF GND CTLR HAD GIVEN ME A RADIO FREQ I WAS NOT FAMILIAR WITH (125.2). I CHKED MY CHARTS AND IT WAS NOT PHF'S TWR. AFTER I HAD TAXIED TO THE RWY; I RADIOED THE PHF TWR FOR TKOF CLRNC. AS I WAS CLBING I SET MY COURSE AS PER THE PHF TWR. I KNEW MY DISTANCE WAS 15 NM TO NGU AND MY ALT WAS TO BE 1200 FT. AS I WAS LEVELING OFF I REALIZED I HAD CLBED 100 FT HIGHER AND QUICKLY CORRECTED MY ALT BACK TO 1200 FT. WHEN I RADIOED NGU TWR FOR CLRNC TO LAND THE CTLR INFORMED ME THAT NORFOLK ARPT HAD PHONED THEM AND WANTED ME TO RADIO THEM AT 125.2. I RADIOED NORFOLK; BUT THE CTLR SAID HE DID NOT NEED TO SPEAK TO ME. I RESET MY RADIO TO NGU FREQ FOR LNDG CLRNC. MY FLT INSTRUCTOR WAS AT THE ARPT WHEN I COMPLETED MY FLT. I INFORMED HIM OF THE SIT AND THAT I WAS WORRIED THAT I MAY HAVE VIOLATED NORFOLK ARPT'S AIRSPACE. HE REQUESTED I COMPLETE THIS FORM AND INFORM YOU OF THE SIT. I FEEL I MADE QUICK DECISIONS; TOOK APPROPRIATE ACTION AND WILL ENSURE MY ALT IS CORRECT IN FUTURE FLTS. AS A STUDENT PLT; I QUICKLY LEARN FROM MY MISTAKES -- AND HOPE TO NOT HAVE TO WRITE TO YOU EXPLAINING ANY MORE SITS.