Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6DFBF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N542EA · BOMBARDIER Regional Jet CRJ-700 · operated by AMERICAN AIRLINES INC

Hex
A6DFBF
Octal
51557677
Decimal
10,936,255
Country
US
Tail
N542EA
Type
CRJ7
Broadcasting now · callsign JIA5513 · 30,325 ft
Flights observed
659
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A6DFBF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A6DFBF 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
JIA5433 PSA Airlines 13 2026-05-20
JIA5621 PSA Airlines 11 2026-05-18
JIA5041 PSA Airlines 10 2026-06-28
JIA5237 - 9 2026-07-05
JIA5219 PSA Airlines 9 2026-06-05
JIA5171 PSA Airlines 9 2026-05-05
JIA5077 PSA Airlines 9 2026-06-04
JIA5032 PSA Airlines 9 2026-06-26
JIA5589 - 8 2026-07-13
JIA5180 - 8 2026-06-29
JIA5400 PSA Airlines 7 2026-05-22
JIA5329 PSA Airlines 7 2026-06-27
JIA5229 - 7 2026-07-07
JIA5614 PSA Airlines 6 2026-04-28
JIA5526 - 6 2026-07-10
JIA5516 - 6 2026-06-25
JIA5440 PSA Airlines 6 2026-05-16
JIA5423 - 6 2026-07-08
JIA5418 - 6 2026-07-06
JIA5375 - 6 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 JIA5153 - Jul 15, 04:15 UTCJul 15, 05:00 UTC45m
2026-07-15 JIA5164 - Jul 15, 03:00 UTCJul 15, 03:35 UTC35m
2026-07-15 JIA5164 DCA → CRW Jul 15, 02:56 UTCJul 15, 03:35 UTC39m
2026-07-14 JIA5617 - Jul 14, 22:25 UTCJul 15, 00:15 UTC1h 49m
2026-07-14 JIA5617 - Jul 14, 15:10 UTCJul 14, 16:50 UTC1h 40m
2026-07-14 JIA5312 MSP → DCA Jul 14, 11:45 UTCJul 14, 13:45 UTC2h 0m
2026-07-14 JIA5312 MSP → DCA Jul 14, 11:44 UTCJul 14, 13:37 UTC1h 53m
2026-07-14 JIA5506 - Jul 14, 00:10 UTCJul 14, 02:10 UTC2h 0m
2026-07-13 JIA5162 - Jul 13, 21:55 UTCJul 13, 22:55 UTC1h 0m
2026-07-13 JIA5162 - Jul 13, 19:55 UTCJul 13, 20:45 UTC50m
2026-07-13 JIA5162 - Jul 13, 19:40 UTCJul 13, 19:50 UTC10m
2026-07-13 JIA5589 - Jul 13, 17:50 UTCJul 13, 18:40 UTC50m
2026-07-13 JIA5589 SYR → DCA Jul 13, 17:44 UTCJul 13, 18:48 UTC1h 4m
2026-07-13 JIA5589 - Jul 13, 15:30 UTCJul 13, 16:15 UTC45m
2026-07-13 JIA5678 - Jul 13, 13:45 UTCJul 13, 14:30 UTC45m
2026-07-13 JIA528T - Jul 13, 11:55 UTCJul 13, 12:45 UTC50m
2026-07-13 JIA5284 - Jul 13, 00:05 UTCJul 13, 01:40 UTC1h 35m
2026-07-12 JIA5455 - Jul 12, 21:35 UTCJul 12, 23:05 UTC1h 30m
2026-07-12 JIA5455 DCA → MGM Jul 12, 21:31 UTCJul 12, 23:12 UTC1h 41m
2026-07-12 JIA5334 - Jul 12, 18:55 UTCJul 12, 20:15 UTC1h 20m
2026-07-12 JIA5534 - Jul 12, 16:35 UTCJul 12, 17:35 UTC1h 0m
2026-07-12 JIA5131 CLE → DCA Jul 12, 14:10 UTCJul 12, 15:05 UTC55m
2026-07-12 JIA5131 CLE → DCA Jul 12, 14:10 UTCJul 12, 15:04 UTC54m
2026-07-12 JIA5131 DCA → CLE Jul 12, 12:15 UTCJul 12, 13:05 UTC50m
2026-07-11 JIA5135 - Jul 11, 22:10 UTCJul 11, 23:10 UTC1h 0m
2026-07-11 JIA5135 - Jul 11, 19:50 UTCJul 11, 20:45 UTC55m
2026-07-11 JIA5235 - Jul 11, 17:15 UTCJul 11, 18:00 UTC45m
2026-07-11 JIA5235 - Jul 11, 14:50 UTCJul 11, 15:35 UTC45m
2026-07-11 JIA5616 - Jul 11, 11:15 UTCJul 11, 13:25 UTC2h 10m
2026-07-10 JIA9969 DCA → PHL Jul 10, 23:05 UTCJul 11, 01:40 UTC2h 35m
2026-07-10 JIA5375 DCA → ROC Jul 10, 21:10 UTCJul 10, 22:15 UTC1h 5m
2026-07-10 JIA5375 DCA → ROC Jul 10, 21:07 UTCJul 10, 22:14 UTC1h 7m
2026-07-10 JIA5526 - Jul 10, 16:15 UTCJul 10, 18:55 UTC2h 40m
2026-07-10 JIA5467 - Jul 10, 12:40 UTCJul 10, 15:10 UTC2h 30m
2026-07-10 JIA5467 DCA → IAH Jul 10, 12:36 UTCJul 10, 15:09 UTC2h 33m
2026-07-10 JIA5062 CAK → DCA Jul 10, 10:49 UTCJul 10, 11:38 UTC49m
2026-07-10 JIA5062 CAK → DCA Jul 10, 10:50 UTCJul 10, 11:45 UTC55m
2026-07-10 JIA5305 DCA → CAK Jul 10, 02:55 UTCJul 10, 03:45 UTC50m
2026-07-10 JIA5254 - Jul 10, 00:50 UTCJul 10, 01:55 UTC1h 5m
2026-07-09 JIA5254 - Jul 9, 19:40 UTCJul 9, 20:40 UTC1h 0m
2026-07-09 JIA5282 - Jul 9, 16:10 UTCJul 9, 17:15 UTC1h 5m
2026-07-09 JIA5282 HPN → DCA Jul 9, 16:08 UTCJul 9, 17:14 UTC1h 6m
2026-07-09 JIA5282 - Jul 9, 13:50 UTCJul 9, 14:40 UTC50m
2026-07-09 JIA5552 - Jul 9, 10:10 UTCJul 9, 11:40 UTC1h 30m
2026-07-09 JIA5547 - Jul 9, 00:55 UTCJul 9, 02:20 UTC1h 25m
2026-07-08 JIA5423 - Jul 8, 21:25 UTCJul 8, 23:35 UTC2h 10m
2026-07-08 JIA5423 - Jul 8, 18:05 UTCJul 8, 20:20 UTC2h 15m
2026-07-08 JIA5581 - Jul 8, 15:10 UTCJul 8, 15:55 UTC45m
2026-07-08 JIA5581 RDU → DCA Jul 8, 15:09 UTCJul 8, 15:39 UTC30m
2026-07-08 JIA5581 DCA → RDU Jul 8, 13:30 UTCJul 8, 14:15 UTC45m

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 N542EA page for operator, model, and routing details .

Mode-S A6DFBF frequently asked

What is Mode-S code A6DFBF?
A6DFBF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N542EA.
Where is Mode-S A6DFBF registered?
Mode-S code A6DFBF 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 A6DFBF broadcasting right now?
Yes. Mode-S A6DFBF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6DFBF, octal 51557677, decimal 10,936,255.
What flights does A6DFBF operate?
Mode-S A6DFBF has broadcast 20 distinct callsigns, including JIA5433, JIA5621, JIA5041, JIA5237, JIA5219.