Apparatus

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sensors Mode-S transponder

A7878F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5843K · AIRBUS A-330-300 · operated by UMB BANK NA TRUSTEE

Hex
A7878F
Octal
51703617
Decimal
10,979,215
Country
US
Tail
N5843K
Type
A333
No current signal · last broadcast 52m ago
Flights observed
67
Distinct callsigns
15
Country
US
Last broadcast
52m ago

Last known position

Most recent position reported by Mode-S A7878F.

Country allocation

The ICAO 24-bit address A7878F 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 15 distinct

Callsign Airline Flights Last seen
ASA2614 Alaska Airlines 15 2026-05-22
ASA2749 Alaska Airlines 11 2026-05-23
ASA2609 Alaska Airlines 6 2026-05-24
ASA2621 Alaska Airlines 5 2026-05-19
ASA2617 Alaska Airlines 5 2026-05-18
ASA2608 Alaska Airlines 5 2026-05-18
ASA2605 Alaska Airlines 5 2026-05-24
ASA2602 Alaska Airlines 3 2026-05-27
ASA2952 Alaska Airlines 2 2026-04-30
ASA2615 Alaska Airlines 2 2026-05-26
ASA2612 Alaska Airlines 2 2026-05-19
ASA2607 Alaska Airlines 2 2026-05-19
ASA2601 Alaska Airlines 2 2026-05-25
ASA2954 Alaska Airlines 1 2026-05-01
ASA2623 Alaska Airlines 1 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 ASA2602 CVG → SMF May 27, 13:25 UTCMay 27, 15:45 UTC2h 20m
2026-05-27 ASA2623 CVG → SMF May 27, 05:04 UTCMay 27, 09:05 UTC4h 1m
2026-05-26 ASA2615 CVG → SBD May 26, 19:10 UTCMay 26, 21:00 UTC1h 50m
2026-05-25 ASA2601 CVG → PDX May 25, 05:05 UTCMay 25, 07:10 UTC2h 5m
2026-05-24 ASA2609 IAH → SBD May 24, 15:00 UTCMay 24, 18:40 UTC3h 40m
2026-05-24 ASA2605 JFK → AFW May 24, 05:25 UTCMay 24, 09:25 UTC4h 0m
2026-05-23 ASA2609 IAH → SBD May 23, 14:55 UTCMay 23, 18:35 UTC3h 40m
2026-05-23 ASA2749 HNL → SMF May 23, 05:30 UTCMay 23, 10:25 UTC4h 55m
2026-05-22 ASA2614 ONT → HNL May 22, 21:15 UTCMay 23, 02:35 UTC5h 19m
2026-05-22 ASA2605 JFK → AFW May 22, 05:20 UTCMay 22, 09:25 UTC4h 4m
2026-05-21 ASA2615 CVG → SBD May 21, 19:10 UTCMay 21, 20:55 UTC1h 45m
2026-05-21 ASA2601 CVG → PDX May 21, 05:00 UTCMay 21, 07:10 UTC2h 10m
2026-05-20 ASA2609 IAH → SBD May 20, 15:05 UTCMay 20, 18:30 UTC3h 25m
2026-05-20 ASA2605 JFK → AFW May 20, 05:10 UTCMay 20, 09:20 UTC4h 10m
2026-05-19 ASA2612 SBD → CVG May 19, 20:10 UTCMay 19, 23:50 UTC3h 40m
2026-05-19 ASA2607 PDX → CVG May 19, 13:05 UTCMay 19, 15:05 UTC2h 0m
2026-05-19 ASA2621 SBD → PDX May 19, 04:00 UTCMay 19, 06:05 UTC2h 5m
2026-05-18 ASA2617 AFW → SMF May 18, 19:50 UTCMay 19, 00:05 UTC4h 15m
2026-05-18 ASA2608 JFK → CVG May 18, 13:10 UTCMay 18, 17:15 UTC4h 5m
2026-05-18 ASA2621 SBD → PDX May 18, 04:00 UTCMay 18, 06:10 UTC2h 10m
2026-05-17 ASA2617 AFW → SMF May 17, 20:10 UTCMay 18, 00:25 UTC4h 15m
2026-05-17 ASA2608 JFK → CVG May 17, 13:15 UTCMay 17, 17:10 UTC3h 55m
2026-05-17 ASA2621 SBD → PDX May 17, 03:50 UTCMay 17, 06:00 UTC2h 10m
2026-05-16 ASA2617 AFW → SMF May 16, 20:10 UTCMay 17, 00:35 UTC4h 25m
2026-05-16 ASA2608 JFK → CVG May 16, 13:21 UTCMay 16, 17:05 UTC3h 45m
2026-05-16 ASA2621 SBD → PDX May 16, 04:05 UTCMay 16, 06:01 UTC1h 56m
2026-05-15 ASA2617 AFW → SMF May 15, 19:55 UTCMay 15, 23:50 UTC3h 55m
2026-05-15 ASA2608 JFK → CVG May 15, 13:10 UTCMay 15, 16:40 UTC3h 29m
2026-05-15 ASA2621 SBD → PDX May 15, 04:10 UTCMay 15, 06:15 UTC2h 5m
2026-05-14 ASA2617 AFW → SMF May 14, 20:10 UTCMay 15, 00:15 UTC4h 5m
2026-05-14 ASA2608 JFK → CVG May 14, 13:20 UTCMay 14, 17:15 UTC3h 55m
2026-05-14 ASA2602 CVG → SMF May 14, 05:00 UTCMay 14, 09:20 UTC4h 20m
2026-05-13 ASA2609 IAH → SBD May 13, 15:00 UTCMay 13, 18:40 UTC3h 40m
2026-05-13 ASA2749 HNL → SMF May 13, 05:45 UTCMay 13, 10:55 UTC5h 10m
2026-05-13 ASA2749 HNL → SMF May 13, 05:35 UTCMay 13, 05:40 UTC5m
2026-05-13 ASA2614 ONT → HNL May 13, 02:15 UTCMay 13, 02:30 UTC15m
2026-05-12 ASA2614 ONT → HNL May 12, 21:01 UTCMay 12, 22:10 UTC1h 10m
2026-05-12 ASA2749 HNL → SMF May 12, 05:45 UTCMay 12, 11:05 UTC5h 20m
2026-05-11 ASA2614 ONT → HNL May 11, 21:15 UTCMay 11, 22:00 UTC45m
2026-05-11 ASA2749 HNL → SMF May 11, 05:30 UTCMay 11, 10:25 UTC4h 55m
2026-05-11 ASA2614 ONT → HNL May 11, 02:45 UTCMay 11, 02:55 UTC10m
2026-05-10 ASA2614 ONT → HNL May 10, 21:19 UTCMay 10, 22:09 UTC50m
2026-05-10 ASA2749 HNL → SMF May 10, 05:34 UTCMay 10, 10:19 UTC4h 45m
2026-05-10 ASA2614 ONT → HNL May 10, 02:20 UTCMay 10, 02:39 UTC20m
2026-05-09 ASA2614 ONT → HNL May 9, 21:09 UTCMay 9, 21:50 UTC40m
2026-05-09 ASA2605 JFK → AFW May 9, 05:20 UTCMay 9, 09:25 UTC4h 5m
2026-05-08 ASA2609 IAH → SBD May 8, 15:05 UTCMay 8, 18:45 UTC3h 40m
2026-05-08 ASA2605 JFK → AFW May 8, 05:20 UTCMay 8, 09:19 UTC4h 0m
2026-05-07 ASA2612 SBD → CVG May 7, 20:05 UTCMay 7, 23:29 UTC3h 25m
2026-05-07 ASA2607 PDX → CVG May 7, 12:45 UTCMay 7, 14:40 UTC1h 55m

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 N5843K page for operator, model, and routing details .

Mode-S A7878F frequently asked

What is Mode-S code A7878F?
A7878F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5843K.
Where is Mode-S A7878F registered?
Mode-S code A7878F 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 A7878F broadcasting right now?
No active broadcast right now. Last signal was 52m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7878F, octal 51703617, decimal 10,979,215.
What flights does A7878F operate?
Mode-S A7878F has broadcast 15 distinct callsigns, including ASA2614, ASA2749, ASA2609, ASA2621, ASA2617.