Apparatus

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sensors Mode-S transponder

A36A21

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N319VF · BOEING 737 MAX 8 · operated by AMERICAN AIRLINES INC

Hex
A36A21
Octal
50665041
Decimal
10,709,537
Country
US
Tail
N319VF
Type
B38M
Broadcasting now · callsign AAL1337 · 34,050 ft
Flights observed
497
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Current position

A36A21 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A36A21 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 9 2026-07-06
AAL3213 American Airlines 8 2026-05-07
AAL2969 American Airlines 8 2026-05-05
AAL2478 - 8 2026-07-07
AAL2393 - 8 2026-07-05
AAL264 - 7 2026-07-05
AAL1623 American Airlines 7 2026-07-26
AAL3315 - 6 2026-06-24
AAL2510 - 6 2026-06-14
AAL2058 American Airlines 6 2026-06-02
AAL1956 - 6 2026-07-02
AAL1686 American Airlines 6 2026-07-22
AAL2744 - 5 2026-07-18
AAL1252 - 5 2026-07-18
AAL903 American Airlines 4 2026-04-21
AAL650 American Airlines 4 2026-07-23
AAL592 American Airlines 4 2026-05-11
AAL585 - 4 2026-07-19
AAL3283 American Airlines 4 2026-07-24
AAL3223 American Airlines 4 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL618 MIA → BOS Jul 26, 20:50 UTCJul 26, 22:15 UTC1h 25m
2026-07-26 AAL1623 MIA → PHL Jul 26, 16:40 UTCJul 26, 19:15 UTC2h 35m
2026-07-26 AAL1623 MIA → PHL Jul 26, 12:20 UTCJul 26, 15:00 UTC2h 40m
2026-07-26 AAL2698 DFW → ABQ Jul 26, 07:10 UTCJul 26, 09:50 UTC2h 40m
2026-07-26 AAL2698 DFW → ABQ Jul 26, 07:06 UTCJul 26, 09:49 UTC2h 43m
2026-07-26 AAL1765 DFW → PIT Jul 26, 04:10 UTCJul 26, 05:30 UTC1h 20m
2026-07-26 AAL1765 DFW → PIT Jul 26, 04:08 UTCJul 26, 05:30 UTC1h 22m
2026-07-25 AAL1725 PHL → DCA Jul 25, 22:50 UTCJul 26, 02:15 UTC3h 25m
2026-07-25 AAL1706 PHL → SRQ Jul 25, 20:35 UTCJul 25, 21:30 UTC55m
2026-07-25 AAL1706 PHL → SRQ Jul 25, 20:30 UTCJul 25, 21:28 UTC58m
2026-07-25 AAL2177 DFW → SFO Jul 25, 14:25 UTCJul 25, 18:40 UTC4h 15m
2026-07-25 AAL2637 PHX → SNA Jul 25, 04:20 UTCJul 25, 05:10 UTC50m
2026-07-24 AAL3191 LGA → MIA Jul 24, 22:20 UTCJul 25, 02:35 UTC4h 15m
2026-07-24 AAL3283 LAX → DCA Jul 24, 15:40 UTCJul 24, 20:15 UTC4h 35m
2026-07-23 AAL650 RDU → LGA Jul 23, 22:50 UTCJul 24, 03:15 UTC4h 25m
2026-07-23 AAL650 RDU → LGA Jul 23, 17:15 UTCJul 23, 21:15 UTC4h 0m
2026-07-23 AAL1225 ORD → PIT Jul 23, 10:40 UTCJul 23, 15:25 UTC4h 45m
2026-07-23 AAL1200 PHL → DFW Jul 23, 04:20 UTCJul 23, 08:40 UTC4h 20m
2026-07-23 AAL1200 PHL → DFW Jul 23, 04:16 UTCJul 23, 08:39 UTC4h 23m
2026-07-22 AAL1686 CLT → SFO Jul 22, 22:10 UTCJul 23, 02:25 UTC4h 15m
2026-07-22 AAL1686 CLT → SFO Jul 22, 16:55 UTCJul 22, 20:50 UTC3h 55m
2026-07-22 AAL2123 LGA → DCA Jul 22, 00:25 UTCJul 22, 04:10 UTC3h 45m
2026-07-21 AAL1490 DFW → BNA Jul 21, 21:25 UTCJul 21, 22:55 UTC1h 30m
2026-07-21 AAL1623 DCA → DFW Jul 21, 17:15 UTCJul 21, 20:00 UTC2h 45m
2026-07-21 AAL1623 DFW → DCA Jul 21, 12:45 UTCJul 21, 15:30 UTC2h 45m
2026-07-21 AAL2821 - Jul 21, 10:05 UTCJul 21, 11:30 UTC1h 25m
2026-07-21 AAL526 CLT → BNA Jul 21, 03:55 UTCJul 21, 04:50 UTC55m
2026-07-21 AAL526 CLT → BNA Jul 21, 03:52 UTCJul 21, 04:47 UTC55m
2026-07-21 AAL1679 BDL → PHL Jul 21, 00:40 UTCJul 21, 01:45 UTC1h 5m
2026-07-20 AAL1679 BDL → PHL Jul 20, 22:25 UTCJul 20, 23:30 UTC1h 5m
2026-07-20 AAL301 GCM → CLT Jul 20, 17:48 UTCJul 20, 20:17 UTC2h 29m
2026-07-20 AAL301 - Jul 20, 13:45 UTCJul 20, 20:20 UTC6h 35m
2026-07-20 AAL2643 - Jul 20, 10:25 UTCJul 20, 11:45 UTC1h 20m
2026-07-19 AAL1044 - Jul 19, 19:50 UTCJul 19, 23:50 UTC4h 0m
2026-07-19 AAL1044 - Jul 19, 19:00 UTCJul 19, 19:10 UTC10m
2026-07-19 AAL585 - Jul 19, 17:15 UTCJul 19, 17:30 UTC15m
2026-07-19 AAL585 - Jul 19, 13:00 UTCJul 19, 16:35 UTC3h 35m
2026-07-19 AAL585 JFK → BGI Jul 19, 12:57 UTCJul 19, 17:30 UTC4h 33m
2026-07-19 AAL2996 - Jul 19, 05:50 UTCJul 19, 10:10 UTC4h 20m
2026-07-18 AAL257 - Jul 18, 23:30 UTCJul 19, 02:15 UTC2h 45m
2026-07-18 AAL2744 - Jul 18, 17:55 UTCJul 18, 20:15 UTC2h 20m
2026-07-18 AAL2744 - Jul 18, 14:25 UTCJul 18, 16:40 UTC2h 15m
2026-07-18 AAL1252 PHL → MIA Jul 18, 10:25 UTCJul 18, 12:50 UTC2h 25m
2026-07-18 AAL1252 PHL → MIA Jul 18, 10:22 UTCJul 18, 12:46 UTC2h 24m
2026-07-17 AAL1751 - Jul 17, 19:05 UTCJul 17, 22:15 UTC3h 10m
2026-07-17 AAL1751 DEN → PHL Jul 17, 19:02 UTCJul 17, 22:20 UTC3h 18m
2026-07-17 AAL3312 PSQ → DEN Jul 17, 13:50 UTCJul 17, 17:05 UTC3h 15m
2026-07-17 AAL3312 PHL → DEN Jul 17, 13:49 UTCJul 17, 17:01 UTC3h 12m
2026-07-17 AAL3312 PHL → PHL Jul 17, 13:29 UTCJul 17, 13:35 UTC5m
2026-07-17 AAL2970 ORD → PHL Jul 17, 10:10 UTCJul 17, 11:39 UTC1h 30m

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 N319VF page for operator, model, and routing details .

Mode-S A36A21 frequently asked

What is Mode-S code A36A21?
A36A21 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N319VF.
Where is Mode-S A36A21 registered?
Mode-S code A36A21 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 A36A21 broadcasting right now?
Yes. Mode-S A36A21 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A36A21, octal 50665041, decimal 10,709,537.
What flights does A36A21 operate?
Mode-S A36A21 has broadcast 20 distinct callsigns, including AAL2725, AAL3213, AAL2969, AAL2478, AAL2393.