Apparatus

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sensors Mode-S transponder

A68CAA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N521AE · BOMBARDIER Regional Jet CRJ-700 · operated by AMERICAN AIRLINES INC

Hex
A68CAA
Octal
51506252
Decimal
10,914,986
Country
US
Tail
N521AE
Type
CRJ7
Transponder active on ground
Flights observed
309
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A68CAA.

Country allocation

The ICAO 24-bit address A68CAA falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
JIA5245 PSA Airlines 7 2026-05-19
JIA5052 PSA Airlines 7 2026-05-14
JIA5251 PSA Airlines 6 2026-05-29
JIA5071 PSA Airlines 6 2026-05-28
JIA5606 PSA Airlines 5 2026-05-14
JIA5521 PSA Airlines 5 2026-05-29
JIA5248 PSA Airlines 5 2026-05-16
JIA5077 PSA Airlines 5 2026-05-06
JIA5516 PSA Airlines 4 2026-06-05
JIA5401 PSA Airlines 4 2026-05-14
JIA5371 PSA Airlines 4 2026-05-03
JIA5339 PSA Airlines 4 2026-04-28
JIA5282 PSA Airlines 4 2026-05-19
JIA5228 PSA Airlines 4 2026-05-03
JIA5159 PSA Airlines 4 2026-05-15
JIA5070 PSA Airlines 4 2026-05-08
JIA5059 PSA Airlines 4 2026-06-05
JIA5656 PSA Airlines 3 2026-06-04
JIA5640 PSA Airlines 3 2026-05-13
JIA5599 PSA Airlines 3 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 JIA5059 DCA → PWM Jun 5, 18:25 UTCJun 5, 19:25 UTC1h 0m
2026-06-05 JIA5059 DCA → PWM Jun 5, 16:25 UTCJun 5, 17:20 UTC55m
2026-06-05 JIA5516 SDF → PHL Jun 5, 14:25 UTCJun 5, 15:30 UTC1h 5m
2026-06-05 JIA5516 SDF → PHL Jun 5, 12:20 UTCJun 5, 13:25 UTC1h 5m
2026-06-05 JIA5301 CLT → LEX Jun 5, 09:55 UTCJun 5, 11:20 UTC1h 25m
2026-06-05 JIA5376 PIT → PHL Jun 5, 01:35 UTCJun 5, 02:50 UTC1h 15m
2026-06-04 JIA5599 PIT → DCA Jun 4, 21:35 UTCJun 4, 23:15 UTC1h 40m
2026-06-04 JIA5599 PIT → DCA Jun 4, 21:34 UTCJun 4, 23:14 UTC1h 40m
2026-06-04 JIA5599 PIT → DCA Jun 4, 18:45 UTCJun 4, 20:25 UTC1h 40m
2026-06-04 JIA5300 BDL → PHL Jun 4, 16:20 UTCJun 4, 16:30 UTC10m
2026-06-04 JIA5300 BDL → PHL Jun 4, 16:10 UTCJun 4, 17:07 UTC57m
2026-06-04 JIA5300 BDL → PHL Jun 4, 14:15 UTCJun 4, 15:00 UTC45m
2026-06-04 JIA5646 CLT → BGR Jun 4, 11:10 UTCJun 4, 12:40 UTC1h 30m
2026-06-04 JIA5656 BUF → PHL Jun 4, 02:35 UTCJun 4, 04:00 UTC1h 25m
2026-06-03 JIA5062 CAK → DCA Jun 3, 22:15 UTCJun 3, 23:10 UTC55m
2026-06-03 JIA5062 CAK → DCA Jun 3, 22:10 UTCJun 3, 23:07 UTC57m
2026-06-03 JIA5114 YYZ → PHL Jun 3, 20:00 UTCJun 3, 21:00 UTC1h 0m
2026-06-03 JIA5114 YYZ → PHL Jun 3, 19:55 UTCJun 3, 20:59 UTC1h 4m
2026-06-03 JIA5179 PHL → RDU Jun 3, 16:15 UTCJun 3, 17:20 UTC1h 5m
2026-06-03 JIA5179 PHL → RDU Jun 3, 14:00 UTCJun 3, 14:55 UTC55m
2026-06-02 JIA5272 GPT → CLT Jun 2, 22:20 UTCJun 2, 22:40 UTC20m
2026-06-02 JIA5272 GPT → CLT Jun 2, 22:17 UTCJun 2, 22:40 UTC23m
2026-06-02 JIA5203 DCA → TUL Jun 2, 21:00 UTCJun 2, 21:20 UTC20m
2026-06-02 JIA5203 DCA → TUL Jun 2, 20:54 UTCJun 2, 21:13 UTC19m
2026-06-02 JIA5220 PHL → CLE Jun 2, 17:20 UTCJun 2, 18:10 UTC50m
2026-06-02 JIA5220 PHL → CLE Jun 2, 15:25 UTCJun 2, 16:15 UTC50m
2026-06-02 JIA5403 HPN → CLT Jun 2, 12:05 UTCJun 2, 13:30 UTC1h 25m
2026-06-02 JIA5403 HPN → CLT Jun 2, 12:03 UTCJun 2, 13:29 UTC1h 26m
2026-06-01 JIA5016 DCA → BTV Jun 1, 23:45 UTCJun 2, 01:15 UTC1h 30m
2026-06-01 JIA5016 DCA → BTV Jun 1, 23:40 UTCJun 2, 01:07 UTC1h 27m
2026-06-01 JIA9951 PIA → PHL Jun 1, 21:50 UTCJun 1, 22:15 UTC25m
2026-06-01 JIA5497 CLT → MSY Jun 1, 00:25 UTCJun 1, 01:25 UTC1h 0m
2026-05-31 JIA5667 DCA → YYZ May 31, 22:30 UTCMay 31, 23:30 UTC1h 0m
2026-05-31 JIA5667 DCA → YYZ May 31, 20:10 UTCMay 31, 21:15 UTC1h 5m
2026-05-31 JIA5311 CLT → MLB May 31, 15:35 UTCMay 31, 17:35 UTC2h 0m
2026-05-31 JIA5311 CLT → MLB May 31, 15:31 UTCMay 31, 17:34 UTC2h 3m
2026-05-30 JIA5506 PHL → MYR May 30, 20:05 UTCMay 30, 22:25 UTC2h 20m
2026-05-30 JIA5506 PHL → MYR May 30, 20:02 UTCMay 30, 22:22 UTC2h 20m
2026-05-30 JIA5145 PHL → PVD May 30, 18:05 UTCMay 30, 19:05 UTC1h 0m
2026-05-30 JIA5145 PHL → PVD May 30, 13:35 UTCMay 30, 14:40 UTC1h 5m
2026-05-30 JIA5244 PHL → CVG May 30, 11:10 UTCMay 30, 12:10 UTC1h 0m
2026-05-30 JIA5244 PHL → CVG May 30, 11:07 UTCMay 30, 12:05 UTC58m
2026-05-30 JIA5597 DCA → TLH May 30, 02:20 UTCMay 30, 03:25 UTC1h 5m
2026-05-29 JIA5452 PHL → DTW May 29, 22:35 UTCMay 30, 00:10 UTC1h 35m
2026-05-29 JJA5072 DFW → BHM May 29, 20:20 UTCMay 29, 21:40 UTC1h 20m
2026-05-29 JIA5521 PHL → JAX May 29, 17:45 UTCMay 29, 18:55 UTC1h 10m
2026-05-29 JIA5521 PHL → JAX May 29, 17:32 UTCMay 29, 18:44 UTC1h 12m
2026-05-29 JIA5521 PHL → JAX May 29, 15:30 UTCMay 29, 16:15 UTC45m
2026-05-29 JIA5356 LIT → CLT May 29, 12:10 UTCMay 29, 13:45 UTC1h 35m
2026-05-29 JIA5356 LIT → CLT May 29, 12:05 UTCMay 29, 13:39 UTC1h 34m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N521AE page for operator, model, and routing details .

Mode-S A68CAA frequently asked

What is Mode-S code A68CAA?
A68CAA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N521AE.
Where is Mode-S A68CAA registered?
Mode-S code A68CAA is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A68CAA broadcasting right now?
Mode-S A68CAA is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A68CAA, octal 51506252, decimal 10,914,986.
What flights does A68CAA operate?
Mode-S A68CAA has broadcast 20 distinct callsigns, including JIA5245, JIA5052, JIA5251, JIA5071, JIA5606.