Apparatus

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sensors Mode-S transponder

A373EA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N321VH · BOEING 737 MAX 8 · operated by AMERICAN AIRLINES INC

Hex
A373EA
Octal
50671752
Decimal
10,712,042
Country
US
Tail
N321VH
Type
B38M
Broadcasting now · callsign AAL2344 · 38,000 ft
Flights observed
511
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Current position

A373EA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A373EA 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
AAL2478 American Airlines 9 2026-06-05
AAL3171 - 8 2026-07-17
AAL2309 - 7 2026-07-09
AAL1193 American Airlines 7 2026-04-15
AAL517 American Airlines 6 2026-04-30
AAL3315 - 6 2026-06-18
AAL2777 American Airlines 6 2026-04-15
AAL2278 - 6 2026-07-09
AAL1113 - 6 2026-07-18
AAL628 American Airlines 5 2026-07-04
AAL2674 - 5 2026-07-08
AAL2644 - 5 2026-06-26
AAL2565 American Airlines 5 2026-04-16
AAL2470 American Airlines 5 2026-07-24
AAL2162 American Airlines 5 2026-04-30
AAL1096 American Airlines 5 2026-04-30
AAL348 - 4 2026-06-30
AAL3239 American Airlines 4 2026-04-29
AAL2969 American Airlines 4 2026-05-01
AAL2799 American Airlines 4 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1161 SBP → DFW Jul 26, 18:45 UTCJul 26, 20:40 UTC1h 55m
2026-07-26 AAL1485 CLT → BOS Jul 26, 11:45 UTCJul 26, 12:40 UTC55m
2026-07-26 AAL1485 CLT → BOS Jul 26, 11:43 UTCJul 26, 15:04 UTC3h 21m
2026-07-26 AAL1727 CLT → JFK Jul 26, 01:15 UTCJul 26, 02:30 UTC1h 15m
2026-07-26 AAL1727 CLT → JFK Jul 26, 01:12 UTCJul 26, 02:29 UTC1h 17m
2026-07-25 AAL2911 LGA → ORD Jul 25, 21:45 UTCJul 25, 22:40 UTC55m
2026-07-25 AAL1954 PHL → SFO Jul 25, 17:10 UTCJul 25, 20:24 UTC3h 14m
2026-07-25 AAL1954 PHL → SFO Jul 25, 17:15 UTCJul 25, 20:25 UTC3h 10m
2026-07-25 AAL3143 MSP → PHX Jul 25, 12:55 UTCJul 25, 15:35 UTC2h 40m
2026-07-25 AAL3142 LAX → SMF Jul 25, 02:15 UTCJul 25, 04:50 UTC2h 35m
2026-07-24 AAL2470 CLT → LAS Jul 24, 23:45 UTCJul 25, 00:40 UTC55m
2026-07-24 AAL2470 CLT → LAS Jul 24, 23:42 UTCJul 25, 00:35 UTC53m
2026-07-24 AAL2470 CLT → LAS Jul 24, 21:35 UTCJul 24, 22:20 UTC45m
2026-07-24 AAL377 MIA → PAP Jul 24, 14:12 UTCJul 24, 19:14 UTC5h 2m
2026-07-24 AAL377 MIA → PAP Jul 24, 14:15 UTCJul 24, 19:10 UTC4h 55m
2026-07-23 AAL2306 DFW → BOS Jul 23, 23:40 UTCJul 24, 02:55 UTC3h 15m
2026-07-23 AAL1911 CLT → PHX Jul 23, 18:40 UTCJul 23, 21:20 UTC2h 40m
2026-07-23 AAL1911 CLT → PHX Jul 23, 14:20 UTCJul 23, 17:10 UTC2h 50m
2026-07-23 AAL1959 PHL → ORD Jul 23, 11:25 UTCJul 23, 12:30 UTC1h 5m
2026-07-23 AAL1959 PHL → ORD Jul 23, 11:10 UTCJul 23, 12:27 UTC1h 17m
2026-07-22 AAL2034 LGA → CLT Jul 22, 23:06 UTCJul 23, 00:16 UTC1h 10m
2026-07-22 AAL2034 LGA → CLT Jul 22, 23:10 UTCJul 23, 00:05 UTC55m
2026-07-22 AAL1911 CLT → PHX Jul 22, 18:50 UTCJul 22, 21:35 UTC2h 45m
2026-07-22 AAL1911 CLT → PHX Jul 22, 14:20 UTCJul 22, 17:00 UTC2h 40m
2026-07-22 AAL2782 IND → DFW Jul 22, 11:10 UTCJul 22, 12:10 UTC1h 0m
2026-07-22 AAL766 PHL → BGR Jul 22, 02:10 UTCJul 22, 03:55 UTC1h 45m
2026-07-21 AAL684R STT → CLT Jul 21, 21:40 UTCJul 22, 00:15 UTC2h 35m
2026-07-21 AAL2684 PHL → PHX Jul 21, 17:35 UTCJul 21, 18:30 UTC55m
2026-07-21 AAL2684 PHL → PHX Jul 21, 17:34 UTCJul 21, 20:08 UTC2h 34m
2026-07-21 AAL1361 RNO → DFW Jul 21, 12:40 UTCJul 21, 15:35 UTC2h 55m
2026-07-21 AAL1273 PHX → BOS Jul 21, 03:50 UTCJul 21, 06:35 UTC2h 45m
2026-07-21 AAL1273 PHX → BOS Jul 21, 03:48 UTCJul 21, 06:34 UTC2h 46m
2026-07-20 AAL2307 IAH → PHL Jul 20, 23:55 UTCJul 21, 02:20 UTC2h 25m
2026-07-20 AAL2307 IAH → PHL Jul 20, 20:10 UTCJul 20, 22:35 UTC2h 25m
2026-07-20 AAL1324 DFW → DFW Jul 20, 12:25 UTCJul 20, 18:35 UTC6h 10m
2026-07-20 AAL1559 - Jul 20, 02:15 UTCJul 20, 03:55 UTC1h 40m
2026-07-19 AAL250R ORD → BDL Jul 19, 21:45 UTCJul 20, 00:00 UTC2h 15m
2026-07-18 AAL1782 LGA → CLT Jul 18, 13:00 UTCJul 18, 15:00 UTC2h 0m
2026-07-18 AAL1782 LGA → CLT Jul 18, 12:59 UTCJul 18, 14:39 UTC1h 40m
2026-07-18 AAL1113 - Jul 18, 09:20 UTCJul 18, 10:40 UTC1h 20m
2026-07-17 AAL1967 PHX → EWR Jul 17, 23:25 UTCJul 18, 03:45 UTC4h 21m
2026-07-17 AAL3171 - Jul 17, 21:15 UTCJul 17, 22:05 UTC50m
2026-07-17 AAL3171 - Jul 17, 19:09 UTCJul 17, 20:10 UTC1h 0m
2026-07-17 AAL1769 PHL → PIT Jul 17, 13:29 UTCJul 17, 18:00 UTC4h 30m
2026-07-17 AAL556 LAS → JFK Jul 17, 06:10 UTCJul 17, 10:40 UTC4h 30m
2026-07-16 AAL2855 JFK → LAS Jul 16, 23:10 UTCJul 17, 03:45 UTC4h 35m
2026-07-16 AAL2855 JFK → LAS Jul 16, 23:06 UTCJul 17, 03:43 UTC4h 37m
2026-07-16 AAL2689 - Jul 16, 16:35 UTCJul 16, 21:00 UTC4h 25m
2026-07-16 AAL1808 LAS → PHX Jul 16, 14:05 UTCJul 16, 14:55 UTC50m
2026-07-16 AAL2864 DFW → LAS Jul 16, 00:13 UTCJul 16, 02:30 UTC2h 17m

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 N321VH page for operator, model, and routing details .

Mode-S A373EA frequently asked

What is Mode-S code A373EA?
A373EA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N321VH.
Where is Mode-S A373EA registered?
Mode-S code A373EA 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 A373EA broadcasting right now?
Yes. Mode-S A373EA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A373EA, octal 50671752, decimal 10,712,042.
What flights does A373EA operate?
Mode-S A373EA has broadcast 20 distinct callsigns, including AAL2478, AAL3171, AAL2309, AAL1193, AAL517.