Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A37B5A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N323VK · BOEING 737 MAX 8 · operated by AMERICAN AIRLINES INC

Hex
A37B5A
Octal
50675532
Decimal
10,713,946
Country
US
Tail
N323VK
Type
B38M
No current signal · last broadcast Jul 26, 21:25 UTC
Flights observed
485
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:25 UTC

Last known position

Most recent position reported by Mode-S A37B5A.

Country allocation

The ICAO 24-bit address A37B5A 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
AAL2725 American Airlines 10 2026-06-29
AAL2310 American Airlines 10 2026-05-19
AAL1772 - 9 2026-07-08
AAL2565 American Airlines 8 2026-04-22
AAL2460 - 7 2026-06-30
AAL2024 American Airlines 7 2026-05-20
AAL650 - 6 2026-06-20
AAL2309 - 6 2026-07-16
AAL2546 - 5 2026-06-19
AAL2393 - 5 2026-06-29
AAL1617 American Airlines 5 2026-07-22
AAL1502 American Airlines 5 2026-04-28
AAL1209 - 5 2026-07-10
AAL909 American Airlines 4 2026-04-28
AAL903 American Airlines 4 2026-04-17
AAL505 - 4 2026-06-26
AAL3316 - 4 2026-06-22
AAL3223 - 4 2026-06-20
AAL301 American Airlines 4 2026-05-21
AAL2916 American Airlines 4 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2165 JFK → MDE Jul 26, 18:50 UTCJul 26, 21:20 UTC2h 30m
2026-07-26 AAL388 DFW → PHL Jul 26, 14:55 UTCJul 26, 16:45 UTC1h 50m
2026-07-26 AAL388 DFW → PHL Jul 26, 14:55 UTCJul 26, 16:43 UTC1h 48m
2026-07-26 AAL462 PHX → ATL Jul 26, 10:50 UTCJul 26, 12:45 UTC1h 55m
2026-07-26 AAL679 PHL → SFO Jul 26, 02:45 UTCJul 26, 04:20 UTC1h 35m
2026-07-26 AAL679 PHL → SFO Jul 26, 02:40 UTCJul 26, 04:20 UTC1h 40m
2026-07-25 AAL250 GIG → DFW Jul 25, 19:25 UTCJul 25, 23:10 UTC3h 45m
2026-07-25 AAL250 GIG → DFW Jul 25, 19:22 UTCJul 25, 23:05 UTC3h 43m
2026-07-25 AAL829 CLT → MEX Jul 25, 14:15 UTCJul 25, 17:40 UTC3h 25m
2026-07-25 AAL2643 JFK → CLT Jul 25, 10:20 UTCJul 25, 11:45 UTC1h 25m
2026-07-24 AAL1224 SFO → PHL Jul 24, 20:00 UTCJul 25, 00:20 UTC4h 20m
2026-07-24 AAL1218 DCA → PHX Jul 24, 14:15 UTCJul 24, 18:25 UTC4h 10m
2026-07-24 AAL2077 BOS → DFW Jul 24, 01:45 UTCJul 24, 04:15 UTC2h 30m
2026-07-23 AAL2140 LGA → DCA Jul 23, 20:00 UTCJul 23, 22:55 UTC2h 55m
2026-07-23 AAL2140 LGA → DCA Jul 23, 15:30 UTCJul 23, 18:25 UTC2h 55m
2026-07-23 AAL3291 GSO → DFW Jul 23, 10:50 UTCJul 23, 13:05 UTC2h 15m
2026-07-23 AAL1316 DFW → JFK Jul 23, 00:35 UTCJul 23, 02:40 UTC2h 5m
2026-07-22 AAL1617 TUS → ORD Jul 22, 20:15 UTCJul 22, 23:00 UTC2h 45m
2026-07-22 AAL1617 TUS → ORD Jul 22, 16:15 UTCJul 22, 18:55 UTC2h 40m
2026-07-22 AAL1617 TUS → ORD Jul 22, 16:13 UTCJul 22, 18:52 UTC2h 39m
2026-07-22 AAL99 RSW → ORD Jul 22, 13:15 UTCJul 22, 14:35 UTC1h 20m
2026-07-22 AAL2564 DFW → ABQ Jul 22, 04:20 UTCJul 22, 05:20 UTC1h 0m
2026-07-21 AAL2509 DCA → MCO Jul 21, 23:30 UTCJul 22, 01:40 UTC2h 10m
2026-07-21 AAL2509 DCA → MCO Jul 21, 20:15 UTCJul 21, 22:15 UTC2h 0m
2026-07-21 AAL2428 PHL → ORD Jul 21, 16:15 UTCJul 21, 18:30 UTC2h 15m
2026-07-21 AAL2428 PHL → ORD Jul 21, 12:35 UTCJul 21, 15:10 UTC2h 35m
2026-07-21 AAL2668 JAC → DFW Jul 21, 03:30 UTCJul 21, 06:30 UTC3h 0m
2026-07-20 AAL2668 JAC → DFW Jul 20, 23:25 UTCJul 21, 02:05 UTC2h 39m
2026-07-20 AAL1845 ORD → LAS Jul 20, 18:50 UTCJul 20, 21:40 UTC2h 50m
2026-07-20 AAL1845 ORD → LAS Jul 20, 14:35 UTCJul 20, 17:20 UTC2h 45m
2026-07-20 AAL468 MSY → DFW Jul 20, 11:20 UTCJul 20, 12:30 UTC1h 10m
2026-07-20 AAL1472 DFW → MSY Jul 20, 04:25 UTCJul 20, 05:30 UTC1h 5m
2026-07-20 AAL688R SNA → DFW Jul 20, 00:15 UTCJul 20, 02:55 UTC2h 40m
2026-07-19 AAL688V DFW → SNA Jul 19, 20:00 UTCJul 19, 22:45 UTC2h 45m
2026-07-18 AAL1395 MSP → DFW Jul 18, 14:20 UTCJul 18, 16:10 UTC1h 50m
2026-07-18 AAL2806 DFW → MSP Jul 18, 00:55 UTCJul 18, 02:45 UTC1h 50m
2026-07-17 AAL1953 JFK → DFW Jul 17, 20:00 UTCJul 17, 23:05 UTC3h 5m
2026-07-17 AAL1953 JFK → DFW Jul 17, 19:56 UTCJul 17, 23:00 UTC3h 4m
2026-07-17 AAL2812 DFW → ORD Jul 17, 17:05 UTCJul 17, 18:29 UTC1h 25m
2026-07-17 AAL1575 - Jul 17, 14:20 UTCJul 17, 15:40 UTC1h 20m
2026-07-16 AAL1071 - Jul 16, 22:40 UTCJul 16, 23:59 UTC1h 20m
2026-07-16 AAL1071 CLT → EWR Jul 16, 22:38 UTCJul 16, 23:54 UTC1h 16m
2026-07-16 AAL2309 - Jul 16, 19:50 UTCJul 16, 20:45 UTC55m
2026-07-16 AAL2309 - Jul 16, 17:30 UTCJul 16, 18:25 UTC55m
2026-07-16 AAL2278 - Jul 16, 14:35 UTCJul 16, 16:00 UTC1h 25m
2026-07-16 AAL2278 - Jul 16, 12:00 UTCJul 16, 13:25 UTC1h 25m
2026-07-16 AAL3168 - Jul 16, 09:10 UTCJul 16, 10:04 UTC55m
2026-07-16 AAL2674 - Jul 16, 02:50 UTCJul 16, 03:40 UTC50m
2026-07-15 AAL2788 - Jul 15, 20:40 UTCJul 16, 00:15 UTC3h 35m
2026-07-15 AAL2795 - Jul 15, 15:30 UTCJul 15, 19:20 UTC3h 50m

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 N323VK page for operator, model, and routing details .

Mode-S A37B5A frequently asked

What is Mode-S code A37B5A?
A37B5A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N323VK.
Where is Mode-S A37B5A registered?
Mode-S code A37B5A 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 A37B5A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37B5A, octal 50675532, decimal 10,713,946.
What flights does A37B5A operate?
Mode-S A37B5A has broadcast 20 distinct callsigns, including AAL2725, AAL2310, AAL1772, AAL2565, AAL2460.