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 3h ago
Flights observed
230
Distinct callsigns
20
Country
US
Last broadcast
3h ago

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 - 39 2026-07-14
ASA2605 - 19 2026-07-11
ASA2749 - 17 2026-07-14
ASA2617 Alaska Airlines 17 2026-05-26
ASA2621 Alaska Airlines 16 2026-05-27
ASA2612 Alaska Airlines 11 2026-06-02
ASA2609 Alaska Airlines 11 2026-05-26
ASA2602 - 10 2026-07-06
ASA2618 - 9 2026-07-12
ASA2613 Alaska Airlines 8 2026-07-07
ASA2607 Alaska Airlines 8 2026-05-24
ASA2623 - 7 2026-07-10
ASA2616 Alaska Airlines 6 2026-06-02
ASA2614 Alaska Airlines 6 2026-05-26
ASA2611 - 6 2026-07-10
ASA2606 Alaska Airlines 6 2026-04-14
ASA2626 - 5 2026-07-07
ASA2625 - 4 2026-07-08
ASA2629 Alaska Airlines 3 2026-05-29
ASA2620 Alaska Airlines 3 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA2749 - Jul 14, 05:45 UTCJul 14, 06:05 UTC20m
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
2026-07-02 ASA2625 - Jul 2, 05:00 UTCJul 2, 08:05 UTC3h 5m
2026-07-01 AS2613 JFK → AFW Jul 1, 06:45 UTCJul 1, 09:45 UTC3h 0m
2026-07-01 AS2626 - Jul 1, 00:35 UTCJul 1, 03:40 UTC3h 5m
2026-06-30 ASA2613 AFW → CVG Jun 30, 06:00 UTCJun 30, 08:50 UTC2h 50m
2026-06-30 ASA2626 - Jun 30, 00:25 UTCJun 30, 03:35 UTC3h 11m
2026-06-29 ASA2602 SMF → AFW Jun 29, 13:19 UTCJun 29, 16:04 UTC2h 45m
2026-06-29 ASA2623 - Jun 29, 04:55 UTCJun 29, 09:14 UTC4h 20m
2026-06-28 AS2611 SMF → CVG Jun 28, 18:10 UTCJun 28, 21:59 UTC3h 50m
2026-06-28 ASA2623 - Jun 28, 04:59 UTCJun 28, 09:30 UTC4h 30m
2026-06-27 ASA2611 SMF → CVG Jun 27, 17:59 UTCJun 27, 21:34 UTC3h 35m
2026-06-27 ASA2625 - Jun 27, 04:59 UTCJun 27, 08:14 UTC3h 15m
2026-06-26 ASA2613 AFW → CVG Jun 26, 06:00 UTCJun 26, 09:10 UTC3h 10m
2026-06-26 ASA2626 AFW → JFK Jun 26, 00:10 UTCJun 26, 03:10 UTC3h 0m
2026-06-25 ASA2613 AFW → CVG Jun 25, 06:09 UTCJun 25, 09:14 UTC3h 5m
2026-06-25 ASA2626 AFW → JFK Jun 25, 00:44 UTCJun 25, 03:40 UTC2h 55m
2026-06-24 ASA2602 SMF → AFW Jun 24, 12:50 UTCJun 24, 15:29 UTC2h 40m
2026-06-24 ASA2623 CVG → SMF Jun 24, 04:44 UTCJun 24, 09:15 UTC4h 30m
2026-06-23 ASA2605 - Jun 23, 17:09 UTCJun 23, 20:49 UTC3h 40m
2026-06-23 ASA2618 - Jun 23, 04:39 UTCJun 23, 08:50 UTC4h 10m
2026-06-22 ASA2611 SMF → AFW Jun 22, 18:09 UTCJun 22, 21:54 UTC3h 45m
2026-06-22 ASA2623 CVG → SMF Jun 22, 06:15 UTCJun 22, 10:34 UTC4h 20m
2026-06-21 ASA2611 SMF → AFW Jun 21, 18:04 UTCJun 21, 21:39 UTC3h 35m
2026-06-21 ASA2623 CVG → SMF Jun 21, 04:54 UTCJun 21, 09:29 UTC4h 35m
2026-06-20 ASA2605 - Jun 20, 17:14 UTCJun 20, 20:40 UTC3h 25m
2026-06-20 ASA2749 - Jun 20, 05:59 UTCJun 20, 10:59 UTC5h 0m
2026-06-19 ASA2608 - Jun 19, 21:09 UTCJun 20, 02:49 UTC5h 40m
2026-06-19 ASA2618 - Jun 19, 04:44 UTCJun 19, 08:54 UTC4h 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 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 3h ago.
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.