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 1h ago
Flights observed
156
Distinct callsigns
20
Country
US
Last broadcast
1h 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 20 distinct

Callsign Airline Flights Last seen
ASA2749 - 19 2026-06-26
ASA2608 - 19 2026-06-26
ASA2614 Alaska Airlines 15 2026-05-22
ASA2628 - 9 2026-07-06
ASA2629 - 8 2026-07-04
ASA2617 - 8 2026-07-11
ASA2602 Alaska Airlines 8 2026-06-05
ASA2605 - 7 2026-06-21
ASA2625 Alaska Airlines 6 2026-06-06
ASA2609 Alaska Airlines 6 2026-05-24
ASA2601 - 6 2026-07-11
ASA2621 Alaska Airlines 5 2026-05-19
ASA2612 Alaska Airlines 5 2026-07-09
ASA2627 - 4 2026-07-10
ASA2616 - 4 2026-07-09
ASA2603 - 4 2026-07-03
ASA2622 - 3 2026-07-10
ASA2618 - 3 2026-06-22
ASA2610 - 3 2026-07-03
ASA2952 Alaska Airlines 2 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 ASA2601 PDX → CVG Jul 11, 13:15 UTCJul 11, 16:50 UTC3h 35m
2026-07-11 ASA2617 SBD → PDX Jul 11, 04:01 UTCJul 11, 05:50 UTC1h 50m
2026-07-10 ASA2622 - Jul 10, 20:25 UTCJul 11, 00:30 UTC4h 5m
2026-07-10 ASA2601 PDX → CVG Jul 10, 13:00 UTCJul 10, 16:50 UTC3h 50m
2026-07-10 ASA2627 - Jul 10, 05:20 UTCJul 10, 09:40 UTC4h 20m
2026-07-09 ASA2616 SBD → CVG Jul 9, 19:50 UTCJul 9, 23:30 UTC3h 40m
2026-07-09 ASA2612 SBD → CVG Jul 9, 13:40 UTCJul 9, 15:35 UTC1h 55m
2026-07-09 ASA2617 SBD → PDX Jul 9, 04:20 UTCJul 9, 06:15 UTC1h 55m
2026-07-08 ASA2622 - Jul 8, 20:30 UTCJul 9, 00:15 UTC3h 45m
2026-07-08 ASA2601 PDX → CVG Jul 8, 13:20 UTCJul 8, 17:15 UTC3h 55m
2026-07-08 ASA2617 SBD → PDX Jul 8, 07:25 UTCJul 8, 09:15 UTC1h 50m
2026-07-07 ASA2622 - Jul 7, 20:30 UTCJul 8, 00:25 UTC3h 55m
2026-07-07 ASA2601 PDX → CVG Jul 7, 13:15 UTCJul 7, 17:05 UTC3h 50m
2026-07-07 ASA2627 - Jul 7, 05:15 UTCJul 7, 09:25 UTC4h 10m
2026-07-06 ASA2616 SBD → CVG Jul 6, 20:05 UTCJul 6, 23:50 UTC3h 45m
2026-07-06 ASA2628 - Jul 6, 01:55 UTCJul 6, 04:45 UTC2h 50m
2026-07-04 ASA2629 - Jul 4, 20:10 UTCJul 4, 22:50 UTC2h 40m
2026-07-04 ASA2628 - Jul 4, 01:55 UTCJul 4, 05:00 UTC3h 5m
2026-07-03 ASA2603 - Jul 3, 19:05 UTCJul 3, 21:00 UTC1h 55m
2026-07-03 ASA2610 - Jul 3, 04:30 UTCJul 3, 06:25 UTC1h 55m
2026-07-02 ASA2629 - Jul 2, 20:15 UTCJul 2, 23:05 UTC2h 50m
2026-07-02 ASA2612 SBD → CVG Jul 2, 14:00 UTCJul 2, 15:55 UTC1h 55m
2026-07-02 ASA2627 - Jul 2, 05:15 UTCJul 2, 09:20 UTC4h 5m
2026-07-01 ASA2616 SBD → CVG Jul 1, 19:45 UTCJul 1, 23:20 UTC3h 35m
2026-07-01 ASA2628 - Jul 1, 02:10 UTCJul 1, 05:05 UTC2h 55m
2026-06-30 ASA2603 - Jun 30, 19:00 UTCJun 30, 20:55 UTC1h 55m
2026-06-28 ASA2951 - Jun 28, 18:29 UTCJun 28, 22:04 UTC3h 35m
2026-06-26 ASA2749 - Jun 26, 11:40 UTCJun 26, 16:44 UTC5h 5m
2026-06-26 ASA2608 - Jun 26, 09:24 UTCJun 26, 09:45 UTC20m
2026-06-26 ASA2608 - Jun 26, 04:45 UTCJun 26, 05:24 UTC40m
2026-06-25 ASA2749 - Jun 25, 06:40 UTCJun 25, 11:30 UTC4h 50m
2026-06-25 ASA2608 - Jun 25, 02:30 UTCJun 25, 02:49 UTC20m
2026-06-24 ASA2608 - Jun 24, 21:04 UTCJun 24, 22:19 UTC1h 15m
2026-06-24 ASA2749 - Jun 24, 05:59 UTCJun 24, 10:45 UTC4h 45m
2026-06-23 ASA2608 - Jun 23, 21:14 UTCJun 24, 02:45 UTC5h 30m
2026-06-23 ASA2749 - Jun 23, 05:39 UTCJun 23, 10:39 UTC5h 0m
2026-06-23 ASA2608 - Jun 23, 01:59 UTCJun 23, 02:24 UTC25m
2026-06-22 ASA2608 - Jun 22, 21:05 UTCJun 22, 21:40 UTC35m
2026-06-22 ASA2618 CVG → ONT Jun 22, 06:05 UTCJun 22, 10:25 UTC4h 20m
2026-06-21 ASA2605 - Jun 21, 17:05 UTCJun 21, 20:29 UTC3h 25m
2026-06-21 ASA2749 - Jun 21, 06:04 UTCJun 21, 11:10 UTC5h 5m
2026-06-21 ASA2608 - Jun 21, 02:10 UTCJun 21, 02:35 UTC25m
2026-06-20 ASA2608 - Jun 20, 21:10 UTCJun 20, 21:55 UTC45m
2026-06-20 ASA2618 CVG → ONT Jun 20, 05:09 UTCJun 20, 09:24 UTC4h 15m
2026-06-19 ASA2605 - Jun 19, 17:14 UTCJun 19, 20:40 UTC3h 25m
2026-06-19 ASA2749 - Jun 19, 06:14 UTCJun 19, 11:14 UTC5h 0m
2026-06-19 ASA2608 JFK → CVG Jun 19, 02:14 UTCJun 19, 02:39 UTC25m
2026-06-18 ASA2608 JFK → CVG Jun 18, 21:10 UTCJun 18, 21:50 UTC40m
2026-06-18 ASA2749 - Jun 18, 07:20 UTCJun 18, 12:15 UTC4h 55m
2026-06-18 ASA2608 JFK → CVG Jun 18, 03:50 UTCJun 18, 04:15 UTC25m

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 1h 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 20 distinct callsigns, including ASA2749, ASA2608, ASA2614, ASA2628, ASA2629.