ATC discovered duplicate call signs and changed the call sign of one of the two aircraft involved.

Attributes
ACN	1151623
Time
Date	201402
Local Time Of Day	0001-0600
Place
Locale Reference	ZKC.ARTCC
State Reference	KS
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Aircraft 2
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Radar 17
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter Other / Unknown

Narrative:

I was working the a-side position when I was asked to assist the radar controller at sector xx with a duplicate callsign issue. ZZZ sector xx was attempting to manually hand off an air carrier; but there was already an aircraft with that callsign in YYY airspace. Both aircraft were on different flight plans and would have been approximately 50 miles apart in YYY airspace. We coordinated a callsign change for the aircraft entering YYY airspace to an air carrier and entered a flight plan for them.ensure the airlines file different callsigns for each flight.

Original NASA ASRS Text

Title: ATC discovered duplicate call signs and changed the call sign of one of the two aircraft involved.

Narrative: I was working the A-side position when I was asked to assist the Radar Controller at Sector XX with a duplicate callsign issue. ZZZ Sector XX was attempting to manually hand off an air carrier; but there was already an aircraft with that callsign in YYY airspace. Both aircraft were on different flight plans and would have been approximately 50 miles apart in YYY airspace. We coordinated a callsign change for the aircraft entering YYY airspace to an air carrier and entered a flight plan for them.Ensure the airlines file different callsigns for each flight.

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.