Narrative:

Accepted wrong clearance. We were air carrier X, other flight air carrier Y, similar call signs. ATC did not listen to readback or inform us of flight with similar call sign.

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Original NASA ASRS Text

Title: B737 FLT CREW ACKNOWLEDGES CLRNC DSCNT ISSUED TO A COMPANY ACR WITH SIMILAR CALL SIGN THAT IS NOT CAUGHT BY ZTL CTLR UNTIL AFTER THE FACT.

Narrative: ACCEPTED WRONG CLRNC. WE WERE ACR X, OTHER FLT ACR Y, SIMILAR CALL SIGNS. ATC DID NOT LISTEN TO READBACK OR INFORM US OF FLT WITH SIMILAR CALL SIGN.

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.