Apparatus

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sensors Mode-S transponder

A45FB1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N381HA · AIRBUS A-330-200 · operated by UMB BANK NA TRUSTEE

Hex
A45FB1
Octal
51057661
Decimal
10,772,401
Country
US
Tail
N381HA
Type
A332
No current signal · last broadcast 1h ago
Flights observed
182
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A45FB1.

Country allocation

The ICAO 24-bit address A45FB1 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
ASA864 - 10 2026-07-13
ASA835 - 9 2026-07-12
ASA817 - 9 2026-06-30
ASA807 - 9 2026-06-17
ASA803 Alaska Airlines 9 2026-05-12
ASA863 - 8 2026-07-13
ASA836 - 8 2026-07-13
ASA876 - 7 2026-06-29
ASA808 - 7 2026-06-17
ASA802 Alaska Airlines 7 2026-05-12
ASA875 Alaska Airlines 6 2026-05-11
ASA832 Alaska Airlines 6 2026-06-18
ASA810 - 6 2026-06-24
ASA831 - 5 2026-06-18
ASA823 - 5 2026-07-08
ASA809 - 5 2026-06-25
ASA801 - 5 2026-07-10
ASA900 - 4 2026-07-08
ASA899 - 4 2026-07-10
ASA824 - 4 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASA836 - Jul 13, 21:50 UTCJul 14, 03:55 UTC6h 5m
2026-07-13 ASA864 - Jul 13, 18:50 UTCJul 13, 19:15 UTC25m
2026-07-13 ASA864 - Jul 13, 12:10 UTCJul 13, 12:55 UTC45m
2026-07-13 ASA863 - Jul 13, 00:10 UTCJul 13, 08:40 UTC8h 30m
2026-07-12 ASA835 - Jul 12, 20:50 UTCJul 12, 21:15 UTC25m
2026-07-12 ASA835 - Jul 12, 15:25 UTCJul 12, 16:35 UTC1h 10m
2026-07-11 ASA836 - Jul 11, 21:30 UTCJul 12, 03:01 UTC5h 30m
2026-07-10 ASA801 - Jul 10, 14:30 UTCJul 10, 20:00 UTC5h 30m
2026-07-10 ASA804 - Jul 10, 07:00 UTCJul 10, 11:45 UTC4h 45m
2026-07-10 ASA899 - Jul 10, 02:25 UTCJul 10, 02:40 UTC15m
2026-07-09 ASA899 - Jul 9, 21:25 UTCJul 9, 22:20 UTC55m
2026-07-09 ASA824 NRT → SEA Jul 9, 10:10 UTCJul 9, 18:35 UTC8h 25m
2026-07-08 ASA823 SEA → NRT Jul 8, 21:35 UTCJul 9, 07:40 UTC10h 5m
2026-07-08 ASA900 - Jul 8, 14:30 UTCJul 8, 15:30 UTC1h 0m
2026-07-08 ASA900 - Jul 8, 09:50 UTCJul 8, 10:05 UTC15m
2026-07-07 ASA864 - Jul 7, 12:00 UTCJul 7, 12:40 UTC40m
2026-07-07 ASA863 - Jul 7, 07:50 UTCJul 7, 08:20 UTC30m
2026-07-07 ASA863 - Jul 7, 00:00 UTCJul 7, 00:25 UTC25m
2026-07-06 ASA835 SFO → PDX Jul 6, 15:30 UTCJul 6, 21:40 UTC6h 10m
2026-07-05 ASA836 ANC → OGG Jul 5, 21:35 UTCJul 6, 02:50 UTC5h 15m
2026-07-05 ASA864 - Jul 5, 18:35 UTCJul 5, 18:45 UTC10m
2026-07-05 ASA864 - Jul 5, 11:40 UTCJul 5, 12:15 UTC35m
2026-07-04 ASA863 - Jul 4, 23:55 UTCJul 5, 08:05 UTC8h 10m
2026-07-04 ASA821 SJC → OGG Jul 4, 20:25 UTCJul 4, 20:40 UTC15m
2026-07-04 ASA821 SJC → OGG Jul 4, 15:15 UTCJul 4, 16:00 UTC45m
2026-07-04 ASA822 - Jul 4, 05:25 UTCJul 4, 06:20 UTC55m
2026-06-30 ASA817 LAS → HNL Jun 30, 09:05 UTCJun 30, 14:50 UTC5h 45m
2026-06-29 ASA876 - Jun 29, 23:44 UTCJun 30, 04:55 UTC5h 11m
2026-06-29 ASA847 - Jun 29, 20:30 UTCJun 29, 20:44 UTC15m
2026-06-29 ASA847 - Jun 29, 15:34 UTCJun 29, 16:04 UTC30m
2026-06-28 ASA848 - Jun 28, 22:39 UTCJun 29, 03:25 UTC4h 45m
2026-06-28 ASA801 - Jun 28, 19:04 UTCJun 28, 19:29 UTC25m
2026-06-28 ASA801 - Jun 28, 14:19 UTCJun 28, 14:50 UTC30m
2026-06-28 ASA804 - Jun 28, 06:55 UTCJun 28, 11:45 UTC4h 50m
2026-06-28 ASA899 - Jun 28, 02:44 UTCJun 28, 03:00 UTC15m
2026-06-27 ASA899 - Jun 27, 21:34 UTCJun 27, 22:15 UTC40m
2026-06-27 ASA824 NRT → SEA Jun 27, 10:05 UTCJun 27, 18:39 UTC8h 35m
2026-06-27 ASA823 - Jun 27, 06:19 UTCJun 27, 07:04 UTC45m
2026-06-26 ASA823 - Jun 26, 21:15 UTCJun 27, 01:24 UTC4h 10m
2026-06-26 ASA824 NRT → SEA Jun 26, 10:05 UTCJun 26, 18:29 UTC8h 25m
2026-06-25 ASA823 SEA → NRT Jun 25, 20:54 UTCJun 26, 07:10 UTC10h 15m
2026-06-25 ASA900 - Jun 25, 16:35 UTCJun 25, 17:49 UTC1h 15m
2026-06-25 ASA900 - Jun 25, 12:25 UTCJun 25, 12:40 UTC15m
2026-06-25 ASA809 - Jun 25, 05:15 UTCJun 25, 10:30 UTC5h 15m
2026-06-24 ASA810 - Jun 24, 18:20 UTCJun 24, 23:10 UTC4h 50m
2026-06-24 ASA809 - Jun 24, 03:29 UTCJun 24, 08:39 UTC5h 10m
2026-06-24 ASA810 - Jun 24, 00:49 UTCJun 24, 01:34 UTC45m
2026-06-23 ASA810 - Jun 23, 20:49 UTCJun 23, 21:10 UTC20m
2026-06-23 ASA817 - Jun 23, 09:05 UTCJun 23, 14:59 UTC5h 55m
2026-06-22 ASA876 - Jun 22, 23:50 UTCJun 23, 04:55 UTC5h 5m

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 N381HA page for operator, model, and routing details .

Mode-S A45FB1 frequently asked

What is Mode-S code A45FB1?
A45FB1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N381HA.
Where is Mode-S A45FB1 registered?
Mode-S code A45FB1 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 A45FB1 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A45FB1, octal 51057661, decimal 10,772,401.
What flights does A45FB1 operate?
Mode-S A45FB1 has broadcast 20 distinct callsigns, including ASA864, ASA835, ASA817, ASA807, ASA803.