Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3428E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N309UL · operated by AMERICAN AIRLINES INC

Hex
A3428E
Octal
50641216
Decimal
10,699,406
Country
US
Tail
N309UL
Type
B38M
No current signal · last broadcast Jul 26, 04:15 UTC
Flights observed
518
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 04:15 UTC

Last known position

Most recent position reported by Mode-S A3428E.

Country allocation

The ICAO 24-bit address A3428E 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
AAL915 - 7 2026-07-17
AAL592 American Airlines 6 2026-05-14
AAL529 American Airlines 6 2026-05-16
AAL2644 American Airlines 6 2026-07-22
AAL2049 - 6 2026-06-30
AAL1283 - 6 2026-07-08
AAL3316 American Airlines 5 2026-04-17
AAL1253 American Airlines 5 2026-04-14
AAL1195 American Airlines 5 2026-05-19
AAL1130 American Airlines 5 2026-06-24
AAL1122 - 5 2026-07-17
AAL916 American Airlines 4 2026-05-23
AAL517 American Airlines 4 2026-05-19
AAL501 American Airlines 4 2026-06-09
AAL454 American Airlines 4 2026-05-15
AAL363 - 4 2026-07-08
AAL3300 - 4 2026-06-16
AAL3034 American Airlines 4 2026-04-29
AAL2680 - 4 2026-07-11
AAL2623 American Airlines 4 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2685 RDU → PHL Jul 26, 03:00 UTCJul 26, 04:10 UTC1h 10m
2026-07-26 AAL2685 RDU → PHL Jul 26, 00:55 UTCJul 26, 01:50 UTC55m
2026-07-25 AAL2646 CLT → EWR Jul 25, 20:35 UTCJul 25, 22:14 UTC1h 39m
2026-07-25 AAL2646 CLT → EWR Jul 25, 17:40 UTCJul 25, 18:25 UTC45m
2026-07-25 AAL653 BOS → CLT Jul 25, 11:55 UTCJul 25, 15:50 UTC3h 55m
2026-07-24 AAL2871 SNA → DFW Jul 24, 23:25 UTCJul 25, 03:00 UTC3h 35m
2026-07-24 AAL2871 SNA → DFW Jul 24, 23:21 UTCJul 25, 02:58 UTC3h 37m
2026-07-24 AAL2623 MIA → DCA Jul 24, 19:10 UTCJul 24, 20:49 UTC1h 39m
2026-07-24 AAL2623 MIA → DCA Jul 24, 16:15 UTCJul 24, 20:50 UTC4h 35m
2026-07-24 AAL1741 SJD → DFW Jul 24, 13:10 UTCJul 24, 14:35 UTC1h 25m
2026-07-24 AAL1741 SJD → DFW Jul 24, 13:06 UTCJul 24, 14:29 UTC1h 23m
2026-07-24 AAL1273 PHX → BOS Jul 24, 05:50 UTCJul 24, 08:30 UTC2h 40m
2026-07-24 AAL1273 PHX → BOS Jul 24, 05:45 UTCJul 24, 08:35 UTC2h 50m
2026-07-24 AAL2158 CLT → MSY Jul 24, 03:15 UTCJul 24, 04:20 UTC1h 5m
2026-07-24 AAL2158 CLT → MSY Jul 24, 01:00 UTCJul 24, 02:05 UTC1h 5m
2026-07-24 AAL2158 CLT → MSY Jul 24, 00:57 UTCJul 24, 02:01 UTC1h 4m
2026-07-23 AAL2510 LGA → MIA Jul 23, 19:45 UTCJul 23, 22:40 UTC2h 55m
2026-07-23 AAL2510 LGA → MIA Jul 23, 15:45 UTCJul 23, 18:35 UTC2h 50m
2026-07-23 AAL2193 TUS → DFW Jul 23, 12:10 UTCJul 23, 14:00 UTC1h 50m
2026-07-23 AAL1109 ORD → DFW Jul 23, 04:35 UTCJul 23, 06:15 UTC1h 40m
2026-07-23 AAL2361 DEN → ORD Jul 23, 00:35 UTCJul 23, 02:50 UTC2h 15m
2026-07-22 AAL2361 DEN → ORD Jul 22, 20:45 UTCJul 22, 23:00 UTC2h 15m
2026-07-22 AAL2644 PHX → SFO Jul 22, 16:30 UTCJul 22, 19:00 UTC2h 30m
2026-07-22 AAL2644 PHX → SFO Jul 22, 16:25 UTCJul 22, 18:57 UTC2h 32m
2026-07-22 AAL2644 PHX → SFO Jul 22, 12:30 UTCJul 22, 14:55 UTC2h 25m
2026-07-22 AAL463 PHX → LAX Jul 22, 01:35 UTCJul 22, 01:45 UTC10m
2026-07-21 AAL463 PHX → LAX Jul 21, 22:55 UTCJul 21, 23:55 UTC1h 0m
2026-07-21 AAL1911 CLT → PHX Jul 21, 18:25 UTCJul 21, 21:20 UTC2h 55m
2026-07-21 AAL1911 CLT → PHX Jul 21, 14:30 UTCJul 21, 17:05 UTC2h 35m
2026-07-20 AAL1137 DFW → DFW Jul 20, 22:10 UTCJul 20, 22:15 UTC5m
2026-07-20 AAL1653 DFW → TPA Jul 20, 17:56 UTCJul 20, 20:24 UTC2h 28m
2026-07-20 AAL1653 DFW → TPA Jul 20, 14:00 UTCJul 20, 20:25 UTC6h 25m
2026-07-20 AAL2243 CLT → PHL Jul 20, 09:10 UTCJul 20, 11:40 UTC2h 30m
2026-07-19 AAL591 SAN → PHL Jul 19, 21:40 UTCJul 20, 02:30 UTC4h 50m
2026-07-19 AAL1966 GUC → DFW Jul 19, 13:00 UTCJul 19, 17:35 UTC4h 35m
2026-07-19 AAL3191 - Jul 19, 00:20 UTCJul 19, 01:05 UTC45m
2026-07-18 AAL3191 - Jul 18, 16:05 UTCJul 18, 20:40 UTC4h 35m
2026-07-18 AAL1808 LAS → PHX Jul 18, 14:05 UTCJul 18, 14:45 UTC40m
2026-07-18 AAL1808 LAS → PHX Jul 18, 14:01 UTCJul 18, 14:45 UTC44m
2026-07-17 AAL2864 DFW → LAS Jul 17, 22:15 UTCJul 18, 00:35 UTC2h 20m
2026-07-17 AAL1609 LGA → DFW Jul 17, 17:25 UTCJul 17, 20:25 UTC3h 0m
2026-07-17 AAL1609 LGA → DFW Jul 17, 17:24 UTCJul 17, 20:23 UTC2h 59m
2026-07-17 AAL1609 DFW → LGA Jul 17, 13:10 UTCJul 17, 16:04 UTC2h 55m
2026-07-17 AAL1122 BOG → DFW Jul 17, 05:42 UTCJul 17, 10:41 UTC4h 59m
2026-07-17 AAL1122 BOG → DFW Jul 17, 05:45 UTCJul 17, 10:44 UTC5h 0m
2026-07-17 AAL915 - Jul 17, 00:30 UTCJul 17, 00:50 UTC20m
2026-07-16 AAL2744 - Jul 16, 14:45 UTCJul 16, 20:35 UTC5h 50m
2026-07-16 AAL401 DCA → MIA Jul 16, 10:20 UTCJul 16, 12:25 UTC2h 5m
2026-07-16 AAL708 - Jul 16, 02:40 UTCJul 16, 04:40 UTC2h 0m
2026-07-16 AAL708 MIA → DCA Jul 16, 02:39 UTCJul 16, 04:51 UTC2h 12m

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 N309UL page for operator, model, and routing details .

Mode-S A3428E frequently asked

What is Mode-S code A3428E?
A3428E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N309UL.
Where is Mode-S A3428E registered?
Mode-S code A3428E 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 A3428E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 04:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3428E, octal 50641216, decimal 10,699,406.
What flights does A3428E operate?
Mode-S A3428E has broadcast 20 distinct callsigns, including AAL915, AAL592, AAL529, AAL2644, AAL2049.