Apparatus

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sensors Mode-S transponder

88821D

ICAO 24-bit transponder address · allocated to Vietnam

Currently assigned to VN-A285 · AIRBUS A-321neo

Hex
88821D
Octal
42101035
Decimal
8,946,205
Country
VN
Tail
VN-A285
Type
A21N
No current signal · last broadcast 8h ago
Flights observed
52
Distinct callsigns
20
Country
VN
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 88821D.

Country allocation

The ICAO 24-bit address 88821D falls within the block assigned to Vietnam (VN) by ICAO Annex 10, Volume III. Every aircraft registered in Vietnam 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
SPQ452 Servicios Aereos Palenque 11 2026-05-31
SPQ451 Servicios Aereos Palenque 11 2026-06-02
SPQ510 Servicios Aereos Palenque 8 2026-05-27
SPQ876 Servicios Aereos Palenque 2 2026-04-25
SPQ809 Servicios Aereos Palenque 2 2026-05-29
SPQ502 Servicios Aereos Palenque 2 2026-05-30
SPQ501 Servicios Aereos Palenque 2 2026-05-30
SPQ956 Servicios Aereos Palenque 1 2026-04-23
SPQ943 - 1 2026-05-28
SPQ879 Servicios Aereos Palenque 1 2026-06-02
SPQ824 Servicios Aereos Palenque 1 2026-04-24
SPQ820 Servicios Aereos Palenque 1 2026-04-25
SPQ811 Servicios Aereos Palenque 1 2026-05-29
SPQ805 Servicios Aereos Palenque 1 2026-06-02
SPQ511 Servicios Aereos Palenque 1 2026-04-15
SPQ450 Servicios Aereos Palenque 1 2026-04-21
SPQ2965 Servicios Aereos Palenque 1 2026-04-23
SPQ2962 Servicios Aereos Palenque 1 2026-04-16
SPQ2952 Servicios Aereos Palenque 1 2026-04-26
SPQ1978 Servicios Aereos Palenque 1 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 SPQ805 HAN → SGN Jun 2, 23:05 UTCJun 2, 23:35 UTC30m
2026-06-02 SPQ879 HAN → SGN Jun 2, 13:40 UTCJun 2, 18:10 UTC4h 30m
2026-06-02 SPQ451 ICN → PQC Jun 2, 03:00 UTCJun 2, 12:10 UTC9h 10m
2026-06-01 SPQ451 ICN → PQC Jun 1, 03:15 UTCJun 1, 21:10 UTC17h 55m
2026-05-31 SPQ452 PQC → ICN May 31, 09:50 UTCMay 31, 21:15 UTC11h 25m
2026-05-30 SPQ501 HKG → PQC May 30, 09:10 UTCMay 30, 23:55 UTC14h 45m
2026-05-30 SPQ502 PQC → HKG May 30, 07:05 UTCMay 30, 07:25 UTC20m
2026-05-29 SPQ809 HAN → SGN May 29, 23:45 UTCMay 30, 00:05 UTC20m
2026-05-29 SPQ501 HKG → PQC May 29, 09:05 UTCMay 29, 17:20 UTC8h 15m
2026-05-29 SPQ502 PQC → HKG May 29, 07:10 UTCMay 29, 07:30 UTC20m
2026-05-29 SPQ811 HAN → SGN May 29, 00:15 UTCMay 29, 00:45 UTC30m
2026-05-28 SPQ943 - May 28, 13:20 UTCMay 28, 16:05 UTC2h 45m
2026-05-28 SPQ451 ICN → PQC May 28, 02:40 UTCMay 28, 12:15 UTC9h 35m
2026-05-27 SPQ452 PQC → ICN May 27, 09:55 UTCMay 27, 21:10 UTC11h 15m
2026-05-27 SPQ510 PQC → TPE May 27, 06:55 UTCMay 27, 08:20 UTC1h 25m
2026-05-25 SPQ451 ICN → PQC May 25, 02:40 UTCMay 25, 05:20 UTC2h 40m
2026-05-24 SPQ452 PQC → ICN May 24, 10:00 UTCMay 24, 21:20 UTC11h 20m
2026-05-24 SPQ510 PQC → TPE May 24, 06:45 UTCMay 24, 08:40 UTC1h 55m
2026-05-23 SPQ451 ICN → PQC May 23, 02:45 UTCMay 23, 05:25 UTC2h 40m
2026-05-22 SPQ452 PQC → ICN May 22, 02:40 UTCMay 22, 21:10 UTC18h 30m
2026-05-21 SPQ452 PQC → ICN May 21, 09:45 UTCMay 21, 21:20 UTC11h 35m
2026-05-21 SPQ510 PQC → TPE May 21, 07:05 UTCMay 21, 08:05 UTC1h 0m
2026-05-09 SPQ451 ICN → PQC May 9, 02:40 UTCMay 9, 05:30 UTC2h 50m
2026-05-08 SPQ452 PQC → ICN May 8, 02:39 UTCMay 8, 21:30 UTC18h 50m
2026-05-07 SPQ452 PQC → ICN May 7, 09:35 UTCMay 7, 21:10 UTC11h 35m
2026-05-07 SPQ510 PQC → TPE May 7, 06:40 UTCMay 7, 07:50 UTC1h 10m
2026-05-04 SPQ451 ICN → PQC May 4, 03:40 UTCMay 4, 06:35 UTC2h 55m
2026-05-03 SPQ452 PQC → ICN May 3, 09:35 UTCMay 3, 20:55 UTC11h 20m
2026-05-03 SPQ510 PQC → TPE May 3, 07:00 UTCMay 3, 08:10 UTC1h 10m
2026-05-02 SPQ451 ICN → PQC May 2, 03:45 UTCMay 2, 06:35 UTC2h 50m
2026-05-01 SPQ452 PQC → ICN May 1, 20:30 UTCMay 1, 23:15 UTC2h 45m
2026-04-30 SPQ451 ICN → PQC Apr 30, 03:50 UTCApr 30, 06:50 UTC3h 0m
2026-04-29 SPQ452 PQC → ICN Apr 29, 09:50 UTCApr 29, 21:00 UTC11h 10m
2026-04-29 SPQ510 PQC → TPE Apr 29, 06:35 UTCApr 29, 07:59 UTC1h 25m
2026-04-28 SPQ451 ICN → PQC Apr 28, 03:55 UTCApr 28, 06:45 UTC2h 50m
2026-04-27 SPQ452 PQC → ICN Apr 27, 18:25 UTCApr 27, 21:20 UTC2h 55m
2026-04-26 SPQ2952 PQC → CXR Apr 26, 08:05 UTCApr 26, 10:20 UTC2h 15m
2026-04-25 SPQ876 SGN → HAN Apr 25, 13:45 UTCApr 25, 13:55 UTC10m
2026-04-25 SPQ820 SGN → HAN Apr 25, 02:00 UTCApr 25, 02:10 UTC10m
2026-04-24 SPQ824 SGN → HAN Apr 24, 03:05 UTCApr 24, 03:15 UTC10m
2026-04-24 SPQ809 HAN → SGN Apr 24, 01:15 UTCApr 24, 01:25 UTC10m
2026-04-23 SPQ876 - Apr 23, 13:25 UTCApr 23, 13:40 UTC15m
2026-04-23 SPQ1978 PQC → SGN Apr 23, 11:30 UTCApr 23, 11:50 UTC20m
2026-04-23 SPQ2965 DAD → PQC Apr 23, 06:45 UTCApr 23, 09:45 UTC3h 0m
2026-04-23 SPQ1969 SGN → PQC Apr 23, 04:55 UTCApr 23, 05:05 UTC10m
2026-04-23 SPQ956 SGN → DAD Apr 23, 00:05 UTCApr 23, 00:15 UTC10m
2026-04-22 SPQ451 ICN → PQC Apr 22, 03:55 UTCApr 22, 08:50 UTC4h 55m
2026-04-21 SPQ450 PQC → ICN Apr 21, 09:40 UTCApr 22, 00:35 UTC14h 55m
2026-04-21 SPQ510 PQC → TPE Apr 21, 05:05 UTCApr 21, 08:00 UTC2h 55m
2026-04-16 SPQ2962 PQC → DAD Apr 16, 05:15 UTCApr 16, 05:29 UTC15m

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 VN-A285 page for operator, model, and routing details .

Mode-S 88821D frequently asked

What is Mode-S code 88821D?
88821D is an ICAO 24-bit transponder address. Allocated to Vietnam. Assigned to VN-A285.
Where is Mode-S 88821D registered?
Mode-S code 88821D is allocated to Vietnam (VN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 88821D broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 88821D, octal 42101035, decimal 8,946,205.
What flights does 88821D operate?
Mode-S 88821D has broadcast 20 distinct callsigns, including SPQ452, SPQ451, SPQ510, SPQ876, SPQ809.