Ground controller reported mistaking an aircraft with similar call sign with another aircraft.

Attributes
ACN	1623664
Time
Date	201903
Local Time Of Day	0601-1200
Place
Locale Reference	JFK.Airport
State Reference	NY
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Route In Use	None
Flight Plan	IFR
Aircraft 2
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Route In Use	None
Flight Plan	IFR
Person 1
Function	Ground
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Narrative:

Aircraft X called for taxi; but I must have heard aircraft Y. I gave taxi instructions to aircraft Y and did not hear the readback differently and was not corrected by the pilot. I continued to work traffic and when I went back to give the aircraft sequence instructions and switch him to tower; I realized that he was definitely not an A319. I then asked him to verify his callsign and found out that it was actually aircraft X; an A321 that I had been giving instructions to. Please advise [airline] that flight wxyz and wyxz should not be proposed for departure anywhere near the same timeframe at the same airport.

Original NASA ASRS Text

Title: Ground controller reported mistaking an aircraft with similar call sign with another aircraft.

Narrative: Aircraft X called for taxi; but I must have heard Aircraft Y. I gave taxi instructions to Aircraft Y and did not hear the readback differently and was not corrected by the pilot. I continued to work traffic and when I went back to give the aircraft sequence instructions and switch him to Tower; I realized that he was definitely not an A319. I then asked him to verify his callsign and found out that it was actually Aircraft X; an A321 that I had been giving instructions to. Please advise [airline] that flight WXYZ and WYXZ should not be proposed for departure anywhere near the same timeframe at the same airport.

Data retrieved from NASA's ASRS site 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.