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sensors Mode-S transponder

A6D857

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N540EG · BOMBARDIER Regional Jet CRJ-700 · operated by AMERICAN AIRLINES INC

Hex
A6D857
Octal
51554127
Decimal
10,934,359
Country
US
Tail
N540EG
Type
CRJ7
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
645
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A6D857.

Country allocation

The ICAO 24-bit address A6D857 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
JIA5338 - 16 2026-07-20
JIA5237 PSA Airlines 14 2026-06-03
JIA5388 - 9 2026-06-29
JIA5043 PSA Airlines 9 2026-05-28
JIA5656 - 7 2026-07-20
JIA5646 - 7 2026-07-20
JIA5167 PSA Airlines 7 2026-04-28
JIA5073 PSA Airlines 7 2026-05-19
JIA5546 PSA Airlines 6 2026-05-28
JIA5484 - 6 2026-07-18
JIA5327 PSA Airlines 6 2026-04-26
JIA5300 - 6 2026-07-18
JIA5261 - 6 2026-07-12
JIA5259 PSA Airlines 6 2026-05-11
JIA5229 PSA Airlines 6 2026-06-04
JIA5208 - 6 2026-06-19
JIA5146 PSA Airlines 6 2026-05-04
JIA5098 - 6 2026-04-16
JIA5052 - 6 2026-07-06
JIA5032 PSA Airlines 6 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JIA5505 DCA → BDL Jul 26, 20:25 UTCJul 26, 21:45 UTC1h 20m
2026-07-26 JIA5505 DCA → BDL Jul 26, 18:05 UTCJul 26, 19:25 UTC1h 20m
2026-07-26 JIA5380 CLE → PHL Jul 26, 15:15 UTCJul 26, 16:35 UTC1h 20m
2026-07-26 JIA5380 CLE → PHL Jul 26, 15:14 UTCJul 26, 16:23 UTC1h 9m
2026-07-26 JIA5380 CLE → PHL Jul 26, 13:00 UTCJul 26, 14:15 UTC1h 15m
2026-07-26 JIA5301 CLT → LEX Jul 26, 10:05 UTCJul 26, 11:20 UTC1h 15m
2026-07-26 JIA5301 CLT → LEX Jul 26, 10:05 UTCJul 26, 11:18 UTC1h 13m
2026-07-26 JIA5376 PIT → PHL Jul 26, 00:21 UTCJul 26, 01:41 UTC1h 20m
2026-07-26 JIA5376 PIT → PHL Jul 26, 00:25 UTCJul 26, 01:40 UTC1h 15m
2026-07-25 JIA5560 DCA → MSY Jul 25, 20:45 UTCJul 25, 22:10 UTC1h 25m
2026-07-25 JIA5084 BDL → PHL Jul 25, 18:30 UTCJul 25, 19:55 UTC1h 25m
2026-07-25 JIA5107 DCA → BGR Jul 25, 15:35 UTCJul 25, 16:40 UTC1h 5m
2026-07-25 JIA5107 DCA → BGR Jul 25, 15:32 UTCJul 25, 16:37 UTC1h 5m
2026-07-25 JIA5107 DCA → BGR Jul 25, 13:50 UTCJul 25, 14:50 UTC1h 0m
2026-07-25 JIA5678 HPN → DCA Jul 25, 10:50 UTCJul 25, 11:35 UTC45m
2026-07-25 JIA5678 HPN → DCA Jul 25, 10:49 UTCJul 25, 11:36 UTC47m
2026-07-25 JIA5289 DCA → HPN Jul 25, 02:16 UTCJul 25, 03:09 UTC53m
2026-07-25 JIA5289 DCA → HPN Jul 25, 02:20 UTCJul 25, 03:10 UTC50m
2026-07-24 JIA5416 MSN → PHL Jul 24, 23:05 UTCJul 25, 01:05 UTC2h 0m
2026-07-24 JIA5416 MSN → PHL Jul 24, 23:02 UTCJul 25, 01:00 UTC1h 58m
2026-07-24 JIA5416 MSN → PHL Jul 24, 19:55 UTCJul 24, 22:15 UTC2h 20m
2026-07-24 JIA5104 GPT → DFW Jul 24, 17:45 UTCJul 24, 18:35 UTC50m
2026-07-24 JIA5104 GPT → DFW Jul 24, 15:30 UTCJul 24, 16:20 UTC50m
2026-07-24 JIA5323 PIT → PHL Jul 24, 13:25 UTCJul 24, 14:05 UTC40m
2026-07-24 JIA5323 PIT → PHL Jul 24, 11:50 UTCJul 24, 12:25 UTC35m
2026-07-24 JIA5351 CLT → MHT Jul 24, 09:50 UTCJul 24, 10:45 UTC55m
2026-07-24 JIA5344 PWM → PHL Jul 24, 02:50 UTCJul 24, 03:45 UTC55m
2026-07-24 JIA5344 PWM → PHL Jul 24, 02:47 UTCJul 24, 03:41 UTC54m
2026-07-23 JIA5333 GSP → PHL Jul 23, 22:30 UTCJul 24, 01:20 UTC2h 50m
2026-07-23 JIA5333 GSP → PHL Jul 23, 18:25 UTCJul 23, 21:05 UTC2h 40m
2026-07-23 JIA5108 CLE → PHL Jul 23, 04:00 UTCJul 23, 05:05 UTC1h 5m
2026-07-23 JIA5108 CLE → PHL Jul 23, 01:35 UTCJul 23, 02:55 UTC1h 20m
2026-07-22 JIA5254 - Jul 22, 22:50 UTCJul 22, 23:45 UTC55m
2026-07-22 JIA5254 HPN → DCA Jul 22, 22:49 UTCJul 22, 23:40 UTC51m
2026-07-22 JIA5254 DCA → HPN Jul 22, 20:45 UTCJul 22, 21:35 UTC50m
2026-07-22 JIA5268 - Jul 22, 14:30 UTCJul 22, 16:30 UTC2h 0m
2026-07-22 JIA5268 - Jul 22, 11:20 UTCJul 22, 13:35 UTC2h 15m
2026-07-21 JIA5085 BNA → DCA Jul 21, 17:10 UTCJul 21, 18:25 UTC1h 15m
2026-07-21 JIA5085 - Jul 21, 14:40 UTCJul 21, 16:10 UTC1h 30m
2026-07-21 JIA5244 DTW → DCA Jul 21, 11:10 UTCJul 21, 12:25 UTC1h 15m
2026-07-21 JIA5597 - Jul 21, 02:10 UTCJul 21, 03:20 UTC1h 10m
2026-07-21 JIA5597 DCA → DTW Jul 21, 02:09 UTCJul 21, 03:19 UTC1h 10m
2026-07-20 JIA5338 - Jul 20, 22:25 UTCJul 20, 23:05 UTC40m
2026-07-20 JIA5338 ORF → DCA Jul 20, 22:24 UTCJul 20, 22:59 UTC35m
2026-07-20 JIA5338 - Jul 20, 20:20 UTCJul 20, 20:55 UTC35m
2026-07-20 JIA5617 - Jul 20, 17:00 UTCJul 20, 18:50 UTC1h 50m
2026-07-20 JIA5617 - Jul 20, 14:20 UTCJul 20, 16:05 UTC1h 45m
2026-07-20 JIA5646 - Jul 20, 11:35 UTCJul 20, 13:10 UTC1h 35m
2026-07-20 JIA5656 DCA → MKE Jul 20, 03:05 UTCJul 20, 04:35 UTC1h 30m
2026-07-20 JIA5108 - Jul 20, 00:25 UTCJul 20, 01:30 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 N540EG page for operator, model, and routing details .

Mode-S A6D857 frequently asked

What is Mode-S code A6D857?
A6D857 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N540EG.
Where is Mode-S A6D857 registered?
Mode-S code A6D857 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 A6D857 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6D857, octal 51554127, decimal 10,934,359.
What flights does A6D857 operate?
Mode-S A6D857 has broadcast 20 distinct callsigns, including JIA5338, JIA5237, JIA5388, JIA5043, JIA5656.