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sensors Mode-S transponder

A7A257

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N591NN · BOMBARDIER Regional Jet CRJ-900 · operated by AMERICAN AIRLINES INC

Hex
A7A257
Octal
51721127
Decimal
10,986,071
Country
US
Tail
N591NN
Type
CRJ9
Broadcasting now · callsign JIA5512 · 31,975 ft
Flights observed
545
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A7A257 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A7A257 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
JIA5616 PSA Airlines 10 2026-06-09
JIA5324 PSA Airlines 10 2026-05-20
JIA5475 PSA Airlines 7 2026-06-01
JIA5196 - 7 2026-06-25
JIA5581 - 6 2026-07-07
JIA5480 PSA Airlines 6 2026-05-26
JIA5416 - 6 2026-07-10
JIA5405 - 6 2026-07-02
JIA5123 PSA Airlines 6 2026-06-19
JIA5650 - 5 2026-06-23
JIA5638 PSA Airlines 5 2026-04-30
JIA5443 PSA Airlines 5 2026-05-27
JIA5387 PSA Airlines 5 2026-06-12
JIA5380 PSA Airlines 5 2026-06-10
JIA5148 PSA Airlines 5 2026-06-22
JIA5144 - 5 2026-06-22
JIA5060 - 5 2026-07-10
JIA5037 - 5 2026-07-13
JIA5663 PSA Airlines 4 2026-04-30
JIA5648 - 4 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JIA5249 - Jul 14, 21:05 UTCJul 14, 22:45 UTC1h 39m
2026-07-14 JIA5249 PHL → LEX Jul 14, 18:35 UTCJul 14, 19:50 UTC1h 15m
2026-07-14 JIA5576 BNA → PHL Jul 14, 14:05 UTCJul 14, 15:45 UTC1h 40m
2026-07-14 JIA5576 PHL → BNA Jul 14, 11:20 UTCJul 14, 12:50 UTC1h 30m
2026-07-13 JIA5095 - Jul 13, 20:05 UTCJul 13, 21:15 UTC1h 10m
2026-07-13 JIA5095 BTV → PHL Jul 13, 20:04 UTCJul 13, 21:08 UTC1h 4m
2026-07-13 JIA5096 - Jul 13, 17:50 UTCJul 13, 18:50 UTC1h 0m
2026-07-13 JIA5037 - Jul 13, 14:00 UTCJul 13, 15:35 UTC1h 35m
2026-07-13 JIA5037 ATL → PHL Jul 13, 13:57 UTCJul 13, 15:32 UTC1h 35m
2026-07-13 JIA5037 PHL → ATL Jul 13, 11:40 UTCJul 13, 13:20 UTC1h 40m
2026-07-13 JIA5487 - Jul 13, 09:40 UTCJul 13, 10:25 UTC45m
2026-07-13 JIA5487 PIT → PHL Jul 13, 09:40 UTCJul 13, 10:24 UTC44m
2026-07-13 JIA5320 PHL → PIT Jul 13, 02:55 UTCJul 13, 03:45 UTC50m
2026-07-13 JIA5590 - Jul 13, 00:05 UTCJul 13, 01:01 UTC55m
2026-07-12 JIA5590 - Jul 12, 21:55 UTCJul 12, 22:55 UTC1h 0m
2026-07-12 JIA5590 - Jul 12, 21:25 UTCJul 12, 21:35 UTC10m
2026-07-12 JIA5165 - Jul 12, 18:05 UTCJul 12, 20:05 UTC2h 0m
2026-07-12 JIA5165 - Jul 12, 15:01 UTCJul 12, 17:10 UTC2h 10m
2026-07-12 JIA5468 - Jul 12, 11:15 UTCJul 12, 13:10 UTC1h 55m
2026-07-11 JIA5415 PHL → MEM Jul 11, 23:35 UTCJul 12, 02:15 UTC2h 40m
2026-07-11 JIA5415 - Jul 11, 22:40 UTCJul 11, 23:05 UTC25m
2026-07-11 JIA5406 DCA → PHL Jul 11, 21:50 UTCJul 11, 22:20 UTC30m
2026-07-11 JIA5308 - Jul 11, 17:55 UTCJul 11, 19:30 UTC1h 35m
2026-07-11 JIA5308 DCA → MSN Jul 11, 15:10 UTCJul 11, 16:50 UTC1h 40m
2026-07-11 JIA5615 BHM → PHL Jul 11, 12:05 UTCJul 11, 13:20 UTC1h 15m
2026-07-11 JIA5065 DCA → ALB Jul 11, 04:55 UTCJul 11, 05:52 UTC57m
2026-07-11 JIA5065 - Jul 11, 04:20 UTCJul 11, 04:35 UTC15m
2026-07-11 JIA5418 - Jul 11, 02:05 UTCJul 11, 03:15 UTC1h 10m
2026-07-10 JIA5418 - Jul 10, 23:30 UTCJul 11, 00:15 UTC45m
2026-07-10 JIA5568 BGR → DCA Jul 10, 20:20 UTCJul 10, 21:53 UTC1h 33m
2026-07-10 JIA5568 BGR → DCA Jul 10, 20:25 UTCJul 10, 21:50 UTC1h 25m
2026-07-10 JIA5568 DCA → BGR Jul 10, 18:00 UTCJul 10, 19:15 UTC1h 15m
2026-07-10 JIA5060 - Jul 10, 14:55 UTCJul 10, 15:55 UTC1h 0m
2026-07-10 JIA5060 DCA → BDL Jul 10, 13:05 UTCJul 10, 14:00 UTC55m
2026-07-10 JIA5416 MSP → DCA Jul 10, 03:40 UTCJul 10, 05:35 UTC1h 55m
2026-07-10 JIA5416 MSP → DCA Jul 10, 03:35 UTCJul 10, 05:34 UTC1h 59m
2026-07-10 JIA5416 DCA → MSP Jul 10, 00:20 UTCJul 10, 02:35 UTC2h 15m
2026-07-09 JIA5092 - Jul 9, 17:05 UTCJul 9, 18:20 UTC1h 15m
2026-07-09 JIA5092 - Jul 9, 15:05 UTCJul 9, 16:15 UTC1h 10m
2026-07-09 JIA5459 BGR → DCA Jul 9, 10:19 UTCJul 9, 11:41 UTC1h 22m
2026-07-09 JIA5436 DCA → BGR Jul 9, 03:15 UTCJul 9, 04:30 UTC1h 15m
2026-07-08 JIA5416 MSP → DCA Jul 8, 23:20 UTCJul 9, 01:45 UTC2h 25m
2026-07-08 JIA5416 MSP → DCA Jul 8, 23:18 UTCJul 9, 01:44 UTC2h 26m
2026-07-08 JIA5416 DCA → MSP Jul 8, 20:15 UTCJul 8, 22:25 UTC2h 10m
2026-07-08 JIA5313 MSY → DCA Jul 8, 16:45 UTCJul 8, 18:50 UTC2h 5m
2026-07-08 JIA5313 DCA → MSY Jul 8, 13:40 UTCJul 8, 15:55 UTC2h 15m
2026-07-08 JIA5160 - Jul 8, 10:10 UTCJul 8, 11:25 UTC1h 15m
2026-07-08 JIA5033 - Jul 8, 02:25 UTCJul 8, 04:10 UTC1h 45m
2026-07-08 JIA5033 CLT → MHT Jul 8, 02:24 UTCJul 8, 04:08 UTC1h 44m
2026-07-07 JIA5604 - Jul 7, 22:25 UTCJul 8, 00:05 UTC1h 40m

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 N591NN page for operator, model, and routing details .

Mode-S A7A257 frequently asked

What is Mode-S code A7A257?
A7A257 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N591NN.
Where is Mode-S A7A257 registered?
Mode-S code A7A257 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 A7A257 broadcasting right now?
Yes. Mode-S A7A257 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7A257, octal 51721127, decimal 10,986,071.
What flights does A7A257 operate?
Mode-S A7A257 has broadcast 20 distinct callsigns, including JIA5616, JIA5324, JIA5475, JIA5196, JIA5581.