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sensors Mode-S transponder

A6F6DD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N548NN · BOMBARDIER Regional Jet CRJ-900 · operated by AMERICAN AIRLINES INC

Hex
A6F6DD
Octal
51573335
Decimal
10,942,173
Country
US
Tail
N548NN
Type
CRJ9
No current signal · last broadcast Jul 26, 20:35 UTC
Flights observed
678
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:35 UTC

Last known position

Most recent position reported by Mode-S A6F6DD.

Country allocation

The ICAO 24-bit address A6F6DD 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
JIA5143 - 13 2026-07-17
JIA5675 PSA Airlines 9 2026-05-10
JIA5256 - 9 2026-07-06
JIA5047 PSA Airlines 9 2026-06-13
JIA5275 - 8 2026-07-16
JIA5655 - 7 2026-06-27
JIA5621 - 6 2026-06-23
JIA5370 - 6 2026-07-12
JIA5131 PSA Airlines 6 2026-06-10
JIA5113 - 6 2026-07-15
JIA5049 PSA Airlines 6 2026-05-18
JIA5644 PSA Airlines 5 2026-06-17
JIA5614 - 5 2026-06-20
JIA5593 PSA Airlines 5 2026-07-26
JIA5331 PSA Airlines 5 2026-05-12
JIA5306 PSA Airlines 5 2026-07-23
JIA5190 PSA Airlines 5 2026-06-06
JIA5172 - 5 2026-06-25
JIA5144 - 5 2026-07-13
JIA5142 - 5 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JIA5420 IND → PHL Jul 26, 19:45 UTCJul 26, 20:35 UTC50m
2026-07-26 JIA5593 MSP → DCA Jul 26, 15:55 UTCJul 26, 17:35 UTC1h 40m
2026-07-26 JIA5593 MSP → DCA Jul 26, 12:55 UTCJul 26, 14:40 UTC1h 45m
2026-07-26 JIA5195 PHL → PWM Jul 26, 10:10 UTCJul 26, 11:15 UTC1h 5m
2026-07-26 JIA5195 PHL → PWM Jul 26, 10:04 UTCJul 26, 11:18 UTC1h 14m
2026-07-26 JIA5186 DCA → BTV Jul 26, 03:15 UTCJul 26, 04:15 UTC1h 0m
2026-07-26 JIA5651 GSP → PHL Jul 26, 00:00 UTCJul 26, 01:35 UTC1h 35m
2026-07-25 JIA5649 MSY → DCA Jul 25, 22:05 UTCJul 25, 23:05 UTC1h 0m
2026-07-25 JIA5649 MSY → DCA Jul 25, 22:01 UTCJul 25, 23:05 UTC1h 4m
2026-07-25 JIA5093 DCA → MHT Jul 25, 18:30 UTCJul 25, 20:20 UTC1h 50m
2026-07-25 JIA5093 DCA → MHT Jul 25, 16:00 UTCJul 25, 17:35 UTC1h 35m
2026-07-25 JIA5322 DCA → PHL Jul 25, 12:40 UTCJul 25, 13:50 UTC1h 10m
2026-07-25 JIA5322 DCA → PHL Jul 25, 12:21 UTCJul 25, 13:40 UTC1h 19m
2026-07-25 JIA5566 PHL → DSM Jul 25, 00:35 UTCJul 25, 01:50 UTC1h 15m
2026-07-24 JIA5307 MGM → DCA Jul 24, 21:20 UTCJul 24, 22:55 UTC1h 35m
2026-07-24 JIA5307 MGM → DCA Jul 24, 18:40 UTCJul 24, 20:20 UTC1h 40m
2026-07-24 JIA5262 SHV → CLT Jul 24, 15:05 UTCJul 24, 16:05 UTC1h 0m
2026-07-24 JIA5262 SHV → CLT Jul 24, 12:25 UTCJul 24, 13:10 UTC45m
2026-07-23 JIA5306 BTV → CLT Jul 23, 18:40 UTCJul 23, 20:25 UTC1h 45m
2026-07-23 JIA5310 BDL → DCA Jul 23, 15:50 UTCJul 23, 17:40 UTC1h 50m
2026-07-23 JIA5218 PNS → PHL Jul 23, 11:15 UTCJul 23, 12:55 UTC1h 40m
2026-07-23 JIA5218 PNS → PHL Jul 23, 11:09 UTCJul 23, 12:55 UTC1h 46m
2026-07-23 JIA5643 MHT → CLT Jul 23, 04:00 UTCJul 23, 05:35 UTC1h 35m
2026-07-23 JIA9958 CLT → BDL Jul 23, 01:25 UTCJul 23, 02:50 UTC1h 25m
2026-07-22 JIA5084 BDL → PHL Jul 22, 22:15 UTCJul 22, 23:35 UTC1h 20m
2026-07-22 JIA5126 - Jul 22, 19:20 UTCJul 22, 20:10 UTC50m
2026-07-22 JIA5126 - Jul 22, 16:55 UTCJul 22, 17:50 UTC55m
2026-07-22 JIA5089 MHT → PHL Jul 22, 14:45 UTCJul 22, 15:35 UTC50m
2026-07-22 JIA5089 MHT → PHL Jul 22, 12:15 UTCJul 22, 13:05 UTC50m
2026-07-22 JIA5351 CLT → MHT Jul 22, 09:42 UTCJul 22, 10:38 UTC56m
2026-07-22 JIA9686 MEM → BTV Jul 22, 00:15 UTCJul 22, 01:35 UTC1h 20m
2026-07-21 JIA5599 - Jul 21, 21:20 UTCJul 21, 23:15 UTC1h 55m
2026-07-21 JIA5413 CLE → DCA Jul 21, 17:20 UTCJul 21, 18:50 UTC1h 30m
2026-07-21 JIA5413 CLE → DCA Jul 21, 17:15 UTCJul 21, 18:49 UTC1h 34m
2026-07-21 JIA5413 CLE → DCA Jul 21, 14:40 UTCJul 21, 16:30 UTC1h 50m
2026-07-21 JIA5160 MHT → DCA Jul 21, 10:09 UTCJul 21, 11:25 UTC1h 16m
2026-07-21 JIA5283 CLT → CVG Jul 21, 04:00 UTCJul 21, 05:00 UTC1h 0m
2026-07-21 JIA5283 CLT → CVG Jul 21, 03:56 UTCJul 21, 05:00 UTC1h 4m
2026-07-21 JIA5387 CMH → PHL Jul 21, 01:10 UTCJul 21, 02:45 UTC1h 35m
2026-07-20 JIA5387 CMH → PHL Jul 20, 22:40 UTCJul 21, 00:05 UTC1h 25m
2026-07-20 JIA5126 - Jul 20, 20:00 UTCJul 20, 20:50 UTC50m
2026-07-20 JIA5126 CLE → DCA Jul 20, 19:58 UTCJul 20, 20:48 UTC50m
2026-07-20 JIA5126 - Jul 20, 17:20 UTCJul 20, 18:15 UTC55m
2026-07-20 JIA5252 PHL → MEM Jul 20, 15:05 UTCJul 20, 16:00 UTC55m
2026-07-20 JIA5252 PHL → MEM Jul 20, 15:02 UTCJul 20, 15:57 UTC55m
2026-07-20 JIA5252 PHL → MEM Jul 20, 13:40 UTCJul 20, 14:15 UTC35m
2026-07-19 JIA5251 - Jul 19, 23:20 UTCJul 20, 00:25 UTC1h 5m
2026-07-19 JIA5251 TYS → DCA Jul 19, 23:19 UTCJul 20, 00:23 UTC1h 4m
2026-07-19 JIA5251 - Jul 19, 21:00 UTCJul 19, 22:05 UTC1h 5m
2026-07-19 JIA5204 - Jul 19, 18:10 UTCJul 19, 19:15 UTC1h 5m

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 N548NN page for operator, model, and routing details .

Mode-S A6F6DD frequently asked

What is Mode-S code A6F6DD?
A6F6DD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N548NN.
Where is Mode-S A6F6DD registered?
Mode-S code A6F6DD 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 A6F6DD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6F6DD, octal 51573335, decimal 10,942,173.
What flights does A6F6DD operate?
Mode-S A6F6DD has broadcast 20 distinct callsigns, including JIA5143, JIA5675, JIA5256, JIA5047, JIA5275.