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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 Jul 25, 04:10 UTC
Flights observed
209
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 04:10 UTC

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
ASA835 - 13 2026-07-20
ASA864 Alaska Airlines 12 2026-07-19
ASA863 Alaska Airlines 11 2026-07-21
ASA836 - 10 2026-07-20
ASA817 - 9 2026-06-30
ASA807 - 9 2026-06-17
ASA803 Alaska Airlines 9 2026-05-12
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
ASA847 Alaska Airlines 4 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 ASA816 HNL → SEA Jul 24, 23:10 UTCJul 25, 04:10 UTC5h 0m
2026-07-24 ASA847 OAK → HNL Jul 24, 20:35 UTCJul 24, 20:50 UTC15m
2026-07-24 ASA847 OAK → HNL Jul 24, 15:40 UTCJul 24, 16:15 UTC35m
2026-07-23 ASA848 HNL → SEA Jul 23, 22:40 UTCJul 24, 03:00 UTC4h 20m
2026-07-23 ASA9934 SFO → SEA Jul 23, 13:45 UTCJul 23, 14:00 UTC15m
2026-07-23 ASA9934 SFO → SEA Jul 23, 07:05 UTCJul 23, 07:45 UTC40m
2026-07-21 ASA863 PDX → GEG Jul 21, 07:30 UTCJul 21, 08:15 UTC45m
2026-07-21 ASA863 PDX → GEG Jul 21, 00:10 UTCJul 21, 00:25 UTC15m
2026-07-20 ASA835 - Jul 20, 21:30 UTCJul 20, 21:50 UTC20m
2026-07-20 ASA835 - Jul 20, 15:25 UTCJul 20, 17:05 UTC1h 40m
2026-07-20 ASA836 - Jul 20, 01:20 UTCJul 20, 03:15 UTC1h 55m
2026-07-19 ASA836 - Jul 19, 21:40 UTCJul 19, 21:55 UTC15m
2026-07-19 ASA864 OGG → SFO Jul 19, 18:45 UTCJul 19, 18:55 UTC10m
2026-07-19 ASA864 OGG → SFO Jul 19, 11:35 UTCJul 19, 12:25 UTC50m
2026-07-19 ASA863 PDX → GEG Jul 19, 00:10 UTCJul 19, 08:10 UTC8h 0m
2026-07-18 ASA811 - Jul 18, 16:20 UTCJul 18, 21:15 UTC4h 55m
2026-07-17 ASA812 OGG → SJC Jul 17, 22:49 UTCJul 18, 03:35 UTC4h 46m
2026-07-17 ASA850 - Jul 17, 12:15 UTCJul 17, 20:04 UTC7h 50m
2026-07-17 ASA849 - Jul 17, 01:20 UTCJul 17, 10:10 UTC8h 50m
2026-07-16 ASA815 - Jul 16, 22:05 UTCJul 16, 22:19 UTC15m
2026-07-16 ASA815 - Jul 16, 16:44 UTCJul 16, 17:49 UTC1h 5m
2026-07-15 ASA816 - Jul 15, 23:00 UTCJul 16, 03:50 UTC4h 50m
2026-07-15 ASA819 - Jul 15, 15:05 UTCJul 15, 20:20 UTC5h 15m
2026-07-15 ASA820 - Jul 15, 04:25 UTCJul 15, 05:15 UTC50m
2026-07-15 ASA820 - Jul 15, 00:35 UTCJul 15, 00:50 UTC15m
2026-07-14 ASA835 - Jul 14, 21:45 UTCJul 14, 22:10 UTC25m
2026-07-14 ASA835 - Jul 14, 15:50 UTCJul 14, 17:10 UTC1h 20m
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

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 Jul 25, 04:10 UTC.
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 ASA835, ASA864, ASA863, ASA836, ASA817.