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sensors Mode-S transponder

A43FA0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N373HA · AIRBUS A-330-200 · operated by HAWAIIAN AIRLINES INC

Hex
A43FA0
Octal
51037640
Decimal
10,764,192
Country
US
Tail
N373HA
Type
A332
No current signal · last broadcast 3h ago
Flights observed
243
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A43FA0.

Country allocation

The ICAO 24-bit address A43FA0 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
ASA899 - 14 2026-07-14
ASA821 Alaska Airlines 11 2026-07-02
ASA900 Alaska Airlines 10 2026-05-29
ASA819 Alaska Airlines 10 2026-07-01
ASA811 Alaska Airlines 10 2026-06-21
ASA824 - 9 2026-07-13
ASA823 - 9 2026-07-12
ASA822 - 9 2026-07-02
ASA806 Alaska Airlines 9 2026-05-28
ASA805 Alaska Airlines 9 2026-05-29
ASA801 - 9 2026-06-25
ASA835 Alaska Airlines 8 2026-07-07
ASA802 - 8 2026-07-08
ASA820 - 7 2026-07-01
ASA930 - 6 2026-07-12
ASA864 - 6 2026-07-08
ASA933 - 5 2026-07-11
ASA841 Alaska Airlines 5 2026-05-11
ASA832 Alaska Airlines 5 2026-05-07
ASA830 Alaska Airlines 5 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA899 - Jul 14, 02:35 UTCJul 14, 02:50 UTC15m
2026-07-13 ASA899 - Jul 13, 21:20 UTCJul 13, 22:05 UTC45m
2026-07-13 ASA824 NRT → SEA Jul 13, 09:45 UTCJul 13, 18:35 UTC8h 50m
2026-07-12 ASA823 - Jul 12, 20:45 UTCJul 13, 06:20 UTC9h 35m
2026-07-12 ASA930 - Jul 12, 03:30 UTCJul 12, 04:35 UTC1h 5m
2026-07-11 ASA933 - Jul 11, 16:10 UTCJul 11, 17:05 UTC55m
2026-07-11 ASA934 - Jul 11, 06:01 UTCJul 11, 06:45 UTC45m
2026-07-10 ASA929 - Jul 10, 18:05 UTCJul 10, 19:00 UTC55m
2026-07-09 ASA930 - Jul 9, 16:10 UTCJul 10, 04:20 UTC12h 10m
2026-07-08 ASA802 - Jul 8, 23:25 UTCJul 9, 04:20 UTC4h 55m
2026-07-08 ASA864 - Jul 8, 11:35 UTCJul 8, 18:40 UTC7h 5m
2026-07-08 ASA863 - Jul 8, 00:25 UTCJul 8, 08:30 UTC8h 5m
2026-07-07 ASA835 SFO → PDX Jul 7, 22:00 UTCJul 7, 22:15 UTC15m
2026-07-07 ASA835 SFO → PDX Jul 7, 16:30 UTCJul 7, 17:50 UTC1h 20m
2026-07-06 ASA836 ANC → OGG Jul 6, 21:50 UTCJul 7, 03:05 UTC5h 15m
2026-07-06 ASA864 - Jul 6, 11:40 UTCJul 6, 18:30 UTC6h 50m
2026-07-06 ASA863 - Jul 6, 00:00 UTCJul 6, 08:05 UTC8h 5m
2026-07-05 ASA852 SFO → HNL Jul 5, 11:10 UTCJul 5, 20:55 UTC9h 45m
2026-07-04 ASA851 - Jul 4, 22:20 UTCJul 5, 08:35 UTC10h 15m
2026-07-04 ASA817 LAS → HNL Jul 4, 09:15 UTCJul 4, 15:05 UTC5h 50m
2026-07-04 ASA876 - Jul 4, 00:20 UTCJul 4, 05:10 UTC4h 50m
2026-07-03 ASA815 - Jul 3, 16:25 UTCJul 3, 22:10 UTC5h 45m
2026-07-02 ASA816 - Jul 2, 23:10 UTCJul 3, 03:50 UTC4h 40m
2026-07-02 ASA821 SJC → OGG Jul 2, 20:45 UTCJul 2, 21:00 UTC15m
2026-07-02 ASA821 SJC → OGG Jul 2, 15:35 UTCJul 2, 16:30 UTC55m
2026-07-02 ASA822 - Jul 2, 03:50 UTCJul 2, 04:55 UTC1h 5m
2026-07-01 ASA819 PAE → HNL Jul 1, 15:35 UTCJul 1, 20:50 UTC5h 15m
2026-07-01 ASA820 - Jul 1, 04:50 UTCJul 1, 09:20 UTC4h 30m
2026-07-01 ASA899 - Jul 1, 02:25 UTCJul 1, 02:40 UTC15m
2026-06-30 ASA899 - Jun 30, 21:15 UTCJun 30, 22:10 UTC55m
2026-06-30 ASA824 NRT → SEA Jun 30, 09:45 UTCJun 30, 17:50 UTC8h 5m
2026-06-29 ASA823 SEA → NRT Jun 29, 21:19 UTCJun 30, 07:20 UTC10h 0m
2026-06-29 ASA824 NRT → SEA Jun 29, 09:34 UTCJun 29, 17:55 UTC8h 20m
2026-06-28 ASA823 SEA → NRT Jun 28, 20:59 UTCJun 29, 06:59 UTC10h 0m
2026-06-28 ASA930 - Jun 28, 03:25 UTCJun 28, 04:15 UTC50m
2026-06-27 ASA933 - Jun 27, 16:04 UTCJun 27, 16:39 UTC35m
2026-06-26 ASA802 - Jun 26, 23:39 UTCJun 27, 04:49 UTC5h 10m
2026-06-26 ASA852 SFO → HNL Jun 26, 11:00 UTCJun 26, 20:24 UTC9h 25m
2026-06-25 ASA851 - Jun 25, 22:20 UTCJun 26, 08:40 UTC10h 20m
2026-06-25 ASA801 - Jun 25, 19:24 UTCJun 25, 19:54 UTC30m
2026-06-25 ASA801 - Jun 25, 14:24 UTCJun 25, 14:59 UTC35m
2026-06-25 ASA804 - Jun 25, 07:00 UTCJun 25, 11:44 UTC4h 45m
2026-06-25 ASA899 - Jun 25, 04:14 UTCJun 25, 04:29 UTC15m
2026-06-24 ASA899 - Jun 24, 23:20 UTCJun 25, 00:14 UTC55m
2026-06-23 ASA822 - Jun 23, 23:10 UTCJun 24, 04:30 UTC5h 20m
2026-06-23 ASA850 - Jun 23, 11:59 UTCJun 23, 13:05 UTC1h 5m
2026-06-23 ASA849 - Jun 23, 09:29 UTCJun 23, 09:40 UTC10m
2026-06-23 ASA849 - Jun 23, 01:10 UTCJun 23, 01:35 UTC25m
2026-06-22 ASA803 - Jun 22, 17:44 UTCJun 22, 23:05 UTC5h 20m
2026-06-21 ASA802 - Jun 21, 23:30 UTCJun 22, 04:24 UTC4h 55m

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 N373HA page for operator, model, and routing details .

Mode-S A43FA0 frequently asked

What is Mode-S code A43FA0?
A43FA0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N373HA.
Where is Mode-S A43FA0 registered?
Mode-S code A43FA0 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 A43FA0 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A43FA0, octal 51037640, decimal 10,764,192.
What flights does A43FA0 operate?
Mode-S A43FA0 has broadcast 20 distinct callsigns, including ASA899, ASA821, ASA900, ASA819, ASA811.