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
133
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
ASA2617 Alaska Airlines 17 2026-05-26
ASA2621 Alaska Airlines 16 2026-05-27
ASA2608 Alaska Airlines 15 2026-05-08
ASA2609 Alaska Airlines 11 2026-05-26
ASA2605 Alaska Airlines 11 2026-05-25
ASA2612 Alaska Airlines 9 2026-05-27
ASA2607 Alaska Airlines 8 2026-05-24
ASA2614 Alaska Airlines 6 2026-05-26
ASA2606 Alaska Airlines 6 2026-04-14
ASA2602 Alaska Airlines 6 2026-05-16
ASA2749 Alaska Airlines 3 2026-05-26
ASA2629 Alaska Airlines 3 2026-05-29
ASA2620 Alaska Airlines 3 2026-05-20
ASA2616 Alaska Airlines 3 2026-05-19
ASA2613 Alaska Airlines 3 2026-05-18
ASA2604 Alaska Airlines 3 2026-05-19
ASA2953 - 2 2026-04-15
ASA2628 Alaska Airlines 2 2026-05-29
ASA2619 Alaska Airlines 2 2026-04-15
ASA2618 - 1 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ASA2629 SBD → IAH May 29, 20:00 UTCMay 29, 22:35 UTC2h 35m
2026-05-29 ASA2628 IAH → SBD May 29, 02:05 UTCMay 29, 05:00 UTC2h 55m
2026-05-28 ASA2629 SBD → IAH May 28, 20:00 UTCMay 28, 22:40 UTC2h 40m
2026-05-28 ASA2628 IAH → SBD May 28, 02:00 UTCMay 28, 05:00 UTC3h 0m
2026-05-27 ASA2629 SBD → IAH May 27, 20:05 UTCMay 27, 22:40 UTC2h 35m
2026-05-27 ASA2612 SBD → CVG May 27, 13:50 UTCMay 27, 15:40 UTC1h 50m
2026-05-27 ASA2621 SBD → PDX May 27, 05:04 UTCMay 27, 07:00 UTC1h 56m
2026-05-26 ASA2617 AFW → SMF May 26, 21:09 UTCMay 27, 00:59 UTC3h 50m
2026-05-26 ASA2609 IAH → SBD May 26, 15:20 UTCMay 26, 19:15 UTC3h 55m
2026-05-26 ASA2749 HNL → SMF May 26, 05:34 UTCMay 26, 10:50 UTC5h 15m
2026-05-26 ASA2614 ONT → HNL May 26, 02:00 UTCMay 26, 02:24 UTC25m
2026-05-25 ASA2614 ONT → HNL May 25, 21:19 UTCMay 25, 21:54 UTC35m
2026-05-25 ASA2605 JFK → AFW May 25, 05:25 UTCMay 25, 09:15 UTC3h 50m
2026-05-24 ASA2612 SBD → CVG May 24, 20:00 UTCMay 24, 23:35 UTC3h 35m
2026-05-24 ASA2607 PDX → CVG May 24, 13:10 UTCMay 24, 15:05 UTC1h 55m
2026-05-23 ASA2621 SBD → PDX May 23, 04:45 UTCMay 23, 06:40 UTC1h 55m
2026-05-22 ASA2617 AFW → SMF May 22, 22:10 UTCMay 23, 02:00 UTC3h 50m
2026-05-22 ASA2609 IAH → SBD May 22, 15:05 UTCMay 22, 18:40 UTC3h 35m
2026-05-22 ASA2749 HNL → SMF May 22, 05:15 UTCMay 22, 10:15 UTC5h 0m
2026-05-22 ASA2614 ONT → HNL May 22, 02:15 UTCMay 22, 02:30 UTC15m
2026-05-21 ASA2614 ONT → HNL May 21, 21:10 UTCMay 21, 22:10 UTC1h 0m
2026-05-21 ASA2605 JFK → AFW May 21, 05:20 UTCMay 21, 09:35 UTC4h 15m
2026-05-20 ASA2612 SBD → CVG May 20, 20:00 UTCMay 20, 23:30 UTC3h 30m
2026-05-20 ASA2620 ONT → HNL May 20, 01:10 UTCMay 20, 04:10 UTC3h 0m
2026-05-19 ASA2616 AFW → JFK May 19, 19:05 UTCMay 19, 21:05 UTC2h 0m
2026-05-19 ASA2604 IAH → CVG May 19, 05:40 UTCMay 19, 07:30 UTC1h 50m
2026-05-18 ASA2613 AFW → CVG May 18, 22:05 UTCMay 19, 00:50 UTC2h 45m
2026-05-18 ASA2620 ONT → HNL May 18, 00:55 UTCMay 18, 03:55 UTC3h 0m
2026-05-17 ASA2616 AFW → JFK May 17, 18:55 UTCMay 17, 21:01 UTC2h 5m
2026-05-17 ASA2604 IAH → CVG May 17, 05:30 UTCMay 17, 07:25 UTC1h 55m
2026-05-16 ASA2613 AFW → CVG May 16, 21:35 UTCMay 17, 00:05 UTC2h 30m
2026-05-16 ASA2607 PDX → CVG May 16, 13:05 UTCMay 16, 14:55 UTC1h 50m
2026-05-16 ASA2602 CVG → SMF May 16, 05:40 UTCMay 16, 10:01 UTC4h 21m
2026-05-15 ASA2612 SBD → CVG May 15, 20:15 UTCMay 15, 23:55 UTC3h 40m
2026-05-15 ASA2607 PDX → CVG May 15, 13:00 UTCMay 15, 14:50 UTC1h 49m
2026-05-15 ASA2602 CVG → SMF May 15, 05:10 UTCMay 15, 09:30 UTC4h 20m
2026-05-14 ASA2609 IAH → SBD May 14, 15:05 UTCMay 14, 18:35 UTC3h 30m
2026-05-14 ASA2605 JFK → AFW May 14, 05:20 UTCMay 14, 09:30 UTC4h 10m
2026-05-13 ASA2612 SBD → CVG May 13, 20:00 UTCMay 13, 23:30 UTC3h 30m
2026-05-13 ASA2607 PDX → CVG May 13, 12:55 UTCMay 13, 14:55 UTC2h 0m
2026-05-13 ASA2602 CVG → SMF May 13, 05:10 UTCMay 13, 09:40 UTC4h 30m
2026-05-12 ASA2609 IAH → SBD May 12, 15:05 UTCMay 12, 18:45 UTC3h 40m
2026-05-12 ASA2605 JFK → AFW May 12, 05:05 UTCMay 12, 09:05 UTC4h 0m
2026-05-11 ASA2609 IAH → SBD May 11, 15:00 UTCMay 11, 18:40 UTC3h 40m
2026-05-11 ASA2605 JFK → AFW May 11, 05:20 UTCMay 11, 09:20 UTC4h 0m
2026-05-10 ASA2609 IAH → SBD May 10, 14:49 UTCMay 10, 18:25 UTC3h 35m
2026-05-10 ASA2605 JFK → AFW May 10, 05:20 UTCMay 10, 09:20 UTC4h 0m
2026-05-09 ASA2612 SBD → CVG May 9, 19:55 UTCMay 9, 23:20 UTC3h 25m
2026-05-09 ASA2607 PDX → CVG May 9, 13:20 UTCMay 9, 15:05 UTC1h 45m
2026-05-09 ASA2621 SBD → PDX May 9, 04:25 UTCMay 9, 06:15 UTC1h 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 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 ASA2617, ASA2621, ASA2608, ASA2609, ASA2605.