PVT PLT IN A PA28 CALLED THE TWR FOR LNDG INFO AND WAS TOLD TO STAND BY. ACFT ENTERED THE TFC PATTERN AND THE TWR CLRED HIM TO LAND AND CALL THE TWR AFTER LNDG TO DISCUSS HIS UNAUTH ENTRY INTO THE CLASS D AIRSPACE.

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ACFT CALLED; NO COM ESTABLISHED; NO IDENT; I JUST REPLIED STAND BY. I WAS BUSY WITH ALL POS COMBINED; NUMEROUS ARRS AND DEPS. ACFT CALLED AGAIN 3 MI E AT 1900 FT. ACTUALLY; ACFT WAS 1 1/2 - 2 MI E; RIGHT IN MY RWY 8 ACTIVE DEP CORRIDOR. PLT HAD NO IDEA WHAT HE DID. ALSO ON TELECON AFTER INCIDENT; HE DID NOT HAVE HIS PLT'S LICENSE ON HIM. SUPPLEMENTAL INFO FROM ACN 385364: CALLED IN ABOUT 12 MI OUT; NO ANSWER. THEN CALLED 10 MI OUT; ATC SAID STAND BY. AT THAT TIME I THOUGHT I WAS CLRED INTO CLASS D AIRSPACE. ATC GOT MY N-NUMBER MIXED UP. SO I CALLED AGAIN; ATC TOLD ME TO ENTER A L DOWNWIND FOR RWY 8. GOT ON FINAL AND ASKED ME MY N-NUMBER AND TOLD ME I WAS CLRED TO LAND. ATC GAVE ME THEIR TELEPHONE NUMBER. THAT'S HOW I FOUND OUT THAT HE DIDN'T CLR ME INTO HIS AIRSPACE. I REALIZE WHAT HAPPENED. I GOT CONFUSED AND THOUGHT I WAS CLRED WHEN ATC SAID STAND BY; BUT HE DID SAY MY N-NUMBER; THEN STAND BY. I TALKED TO AN INSTRUCTOR WHICH CLRED EVERYTHING UP WITH ME. THE OTHER NUMBER ATC WAS USING WAS CESSNA XCB; INSTEAD OF ARROW XAB.