Apparatus

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sensors Mode-S transponder

A5A38E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4621K · operated by UMB BANK NA TRUSTEE

Hex
A5A38E
Octal
51321616
Decimal
10,855,310
Country
US
Tail
N4621K
Type
A333
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
257
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A5A38E.

Country allocation

The ICAO 24-bit address A5A38E 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
ASA2608 - 41 2026-07-15
ASA2605 - 20 2026-07-15
ASA2749 - 18 2026-07-15
ASA2617 Alaska Airlines 17 2026-05-26
ASA2621 Alaska Airlines 16 2026-05-27
ASA2602 Alaska Airlines 14 2026-07-23
ASA2612 - 12 2026-07-16
ASA2613 Alaska Airlines 11 2026-07-25
ASA2609 Alaska Airlines 11 2026-05-26
ASA2623 Alaska Airlines 10 2026-07-23
ASA2618 - 9 2026-07-12
ASA2611 Alaska Airlines 9 2026-07-26
ASA2626 Alaska Airlines 8 2026-07-25
ASA2625 Alaska Airlines 8 2026-07-26
ASA2607 Alaska Airlines 8 2026-05-24
ASA2616 - 7 2026-07-16
ASA2614 Alaska Airlines 6 2026-05-26
ASA2606 Alaska Airlines 6 2026-04-14
ASA2629 Alaska Airlines 3 2026-05-29
ASA2627 - 3 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA2611 SMF → AFW Jul 26, 18:15 UTCJul 26, 21:30 UTC3h 15m
2026-07-26 ASA2625 AFW → SMF Jul 26, 07:05 UTCJul 26, 09:55 UTC2h 50m
2026-07-25 ASA2613 AFW → CVG Jul 25, 06:20 UTCJul 25, 09:20 UTC3h 0m
2026-07-25 ASA2626 AFW → JFK Jul 25, 00:20 UTCJul 25, 03:25 UTC3h 5m
2026-07-24 ASA2613 AFW → CVG Jul 24, 06:15 UTCJul 24, 09:10 UTC2h 55m
2026-07-24 ASA2626 AFW → JFK Jul 24, 00:10 UTCJul 24, 03:15 UTC3h 5m
2026-07-23 ASA2602 CVG → SMF Jul 23, 12:55 UTCJul 23, 15:45 UTC2h 50m
2026-07-23 ASA2623 CVG → SMF Jul 23, 06:10 UTCJul 23, 10:25 UTC4h 15m
2026-07-22 ASA2611 - Jul 22, 18:10 UTCJul 22, 22:05 UTC3h 55m
2026-07-22 ASA2625 AFW → SMF Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-21 ASA2602 SMF → AFW Jul 21, 12:50 UTCJul 21, 15:45 UTC2h 55m
2026-07-21 ASA2625 AFW → SMF Jul 21, 05:10 UTCJul 21, 08:05 UTC2h 55m
2026-07-20 ASA2602 SMF → AFW Jul 20, 12:50 UTCJul 20, 15:50 UTC3h 0m
2026-07-20 ASA2625 AFW → SMF Jul 20, 04:55 UTCJul 20, 07:45 UTC2h 50m
2026-07-19 ASA2613 AFW → CVG Jul 19, 06:25 UTCJul 19, 09:35 UTC3h 10m
2026-07-19 ASA2626 AFW → JFK Jul 19, 00:55 UTCJul 19, 04:00 UTC3h 5m
2026-07-18 ASA2602 SMF → AFW Jul 18, 16:15 UTCJul 18, 19:10 UTC2h 55m
2026-07-18 ASA2623 CVG → SMF Jul 18, 06:15 UTCJul 18, 10:05 UTC3h 50m
2026-07-17 ASA2611 SMF → CVG Jul 17, 18:25 UTCJul 17, 22:20 UTC3h 55m
2026-07-17 ASA2623 CVG → SMF Jul 17, 05:10 UTCJul 17, 09:04 UTC3h 55m
2026-07-16 ASA2616 SBD → CVG Jul 16, 19:40 UTCJul 16, 23:35 UTC3h 55m
2026-07-16 ASA2612 PDX → SBD Jul 16, 13:25 UTCJul 16, 15:30 UTC2h 5m
2026-07-16 ASA2627 CVG → PDX Jul 16, 05:50 UTCJul 16, 09:45 UTC3h 55m
2026-07-15 ASA2605 - Jul 15, 17:10 UTCJul 15, 21:10 UTC4h 0m
2026-07-15 ASA2749 - Jul 15, 06:00 UTCJul 15, 10:45 UTC4h 45m
2026-07-15 ASA2608 - Jul 15, 02:15 UTCJul 15, 02:30 UTC15m
2026-07-14 ASA2608 - Jul 14, 21:00 UTCJul 14, 21:50 UTC50m
2026-07-14 ASA2749 - Jul 14, 05:45 UTCJul 14, 10:50 UTC5h 5m
2026-07-14 ASA2608 - Jul 14, 01:50 UTCJul 14, 02:15 UTC25m
2026-07-13 ASA2608 - Jul 13, 21:00 UTCJul 13, 21:35 UTC35m
2026-07-13 ASA2749 - Jul 13, 05:50 UTCJul 13, 11:00 UTC5h 10m
2026-07-13 ASA2608 - Jul 13, 02:15 UTCJul 13, 02:25 UTC10m
2026-07-12 ASA2608 - Jul 12, 21:10 UTCJul 12, 22:10 UTC1h 0m
2026-07-12 ASA2618 - Jul 12, 05:01 UTCJul 12, 08:35 UTC3h 35m
2026-07-11 ASA2605 - Jul 11, 17:20 UTCJul 11, 21:15 UTC3h 55m
2026-07-11 ASA2618 - Jul 11, 05:05 UTCJul 11, 09:05 UTC4h 0m
2026-07-10 ASA2611 SMF → CVG Jul 10, 18:00 UTCJul 10, 21:50 UTC3h 50m
2026-07-10 ASA2623 - Jul 10, 05:10 UTCJul 10, 09:40 UTC4h 30m
2026-07-09 ASA2605 - Jul 9, 17:10 UTCJul 9, 20:50 UTC3h 40m
2026-07-09 ASA2922 SMF → ONT Jul 9, 10:25 UTCJul 9, 11:25 UTC1h 0m
2026-07-08 ASA2625 - Jul 8, 05:00 UTCJul 8, 08:05 UTC3h 5m
2026-07-07 ASA2613 AFW → CVG Jul 7, 07:00 UTCJul 7, 10:05 UTC3h 5m
2026-07-07 ASA2626 - Jul 7, 01:10 UTCJul 7, 04:15 UTC3h 5m
2026-07-06 ASA2602 SMF → AFW Jul 6, 12:25 UTCJul 6, 15:05 UTC2h 40m
2026-07-06 ASA2625 - Jul 6, 04:40 UTCJul 6, 07:45 UTC3h 5m
2026-07-04 ASA2613 AFW → CVG Jul 4, 06:25 UTCJul 4, 09:25 UTC3h 0m
2026-07-04 ASA2626 - Jul 4, 00:30 UTCJul 4, 03:55 UTC3h 25m
2026-07-03 ASA2602 SMF → AFW Jul 3, 12:30 UTCJul 3, 15:10 UTC2h 40m
2026-07-03 ASA2623 CVG → SMF Jul 3, 05:10 UTCJul 3, 09:20 UTC4h 10m
2026-07-02 ASA2611 SMF → CVG Jul 2, 18:35 UTCJul 2, 22:25 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 N4621K page for operator, model, and routing details .

Mode-S A5A38E frequently asked

What is Mode-S code A5A38E?
A5A38E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4621K.
Where is Mode-S A5A38E registered?
Mode-S code A5A38E 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 A5A38E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5A38E, octal 51321616, decimal 10,855,310.
What flights does A5A38E operate?
Mode-S A5A38E has broadcast 20 distinct callsigns, including ASA2608, ASA2605, ASA2749, ASA2617, ASA2621.