Regional Jet 200 ER/LR (CRJ200)
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Communication Breakdown; Confusion; Situational Awareness
ATC Issue All Types; Airspace Violation All Types; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Human Factors; Procedure
I was working the north side of the approach airspace and ZNY called and asked for control to climb our departures to 12;000. I gave ZNY the control to climb. The next aircraft that called was Aircraft X. I radar identified them and climbed them to 12;000 in an area that PHL owns 10;000. I turned Aircraft X to the fix on his route and noticed shortly after that he was climbing out of 10;500. I asked Aircraft X to confirm assigned altitude and he answered 12;000. I made the point out to ZDC and noticed traffic at 12;000 descending eastward behind Aircraft X. ZDC referenced traffic; but I left the land line to stop Aircraft X at 11;000. ZDC called back about the referenced traffic but Aircraft X was already back in my airspace. I then handed Aircraft X off to ZNY at 12;000; which was approved by ZNY.No recommendations. I heard 12;000 when I approved ZNY control to climb; and that was in my head at the time.
PHL TRACON Controller reported climbing an aircraft to an incorrect altitude; after the Center requested the controller to climb departures. Readback/hearback issues were cited as contributors to the event.