Apparatus

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sensors Mode-S transponder

88821C

ICAO 24-bit transponder address · allocated to Vietnam

Currently assigned to VN-A284 · AIRBUS A-321neo

Hex
88821C
Octal
42101034
Decimal
8,946,204
Country
VN
Tail
VN-A284
Type
A21N
No current signal · last broadcast 22m ago
Flights observed
71
Distinct callsigns
20
Country
VN
Last broadcast
22m ago

Last known position

Most recent position reported by Mode-S 88821C.

Country allocation

The ICAO 24-bit address 88821C 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
SPQ451 Servicios Aereos Palenque 14 2026-05-13
SPQ510 Servicios Aereos Palenque 13 2026-05-12
SPQ452 Servicios Aereos Palenque 8 2026-05-12
SPQ450 Servicios Aereos Palenque 6 2026-04-22
SPQ511 Servicios Aereos Palenque 4 2026-04-18
SPQ1244 Servicios Aereos Palenque 3 2026-05-29
SPQ1978 Servicios Aereos Palenque 2 2026-04-25
SPQ1969 Servicios Aereos Palenque 2 2026-04-25
SPQ1224 Servicios Aereos Palenque 2 2026-05-29
SPQ961 Servicios Aereos Palenque 1 2026-04-24
SPQ956 Servicios Aereos Palenque 1 2026-04-24
SPQ930 Servicios Aereos Palenque 1 2026-05-28
SPQ908 Servicios Aereos Palenque 1 2026-05-29
SPQ873 - 1 2026-04-23
SPQ821 Servicios Aereos Palenque 1 2026-04-25
SPQ804 Servicios Aereos Palenque 1 2026-04-24
SPQ502 Servicios Aereos Palenque 1 2026-05-26
SPQ501 Servicios Aereos Palenque 1 2026-05-26
SPQ2966 Servicios Aereos Palenque 1 2026-04-24
SPQ2965 Servicios Aereos Palenque 1 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 SPQ1221 HAN → PQC May 30, 04:40 UTCMay 30, 05:00 UTC20m
2026-05-29 SPQ908 DAD → HAN May 29, 23:30 UTCMay 30, 02:30 UTC3h 0m
2026-05-29 SPQ1244 PQC → HAN May 29, 12:15 UTCMay 29, 16:25 UTC4h 10m
2026-05-29 SPQ1224 PQC → HAN May 29, 10:15 UTCMay 29, 10:30 UTC15m
2026-05-29 RPQ1225 - May 29, 06:20 UTCMay 29, 06:30 UTC10m
2026-05-29 SPQ1207 HAN → PQC May 29, 00:45 UTCMay 29, 01:10 UTC25m
2026-05-28 SPQ1244 PQC → HAN May 28, 16:40 UTCMay 28, 17:00 UTC20m
2026-05-28 SPQ1245 HAN → PQC May 28, 12:50 UTCMay 28, 13:10 UTC20m
2026-05-28 SPQ930 DAD → HAN May 28, 00:05 UTCMay 28, 11:25 UTC11h 20m
2026-05-27 SPQ1244 - May 27, 12:35 UTCMay 27, 17:00 UTC4h 25m
2026-05-27 SPQ1224 PQC → HAN May 27, 10:55 UTCMay 27, 11:15 UTC20m
2026-05-26 SPQ501 HKG → PQC May 26, 09:09 UTCMay 26, 09:25 UTC15m
2026-05-26 SPQ502 PQC → HKG May 26, 07:10 UTCMay 26, 07:29 UTC20m
2026-05-13 SPQ451 ICN → PQC May 13, 02:40 UTCMay 13, 05:25 UTC2h 45m
2026-05-12 SPQ452 PQC → ICN May 12, 10:10 UTCMay 12, 21:15 UTC11h 5m
2026-05-12 SPQ510 PQC → TPE May 12, 06:45 UTCMay 12, 07:55 UTC1h 10m
2026-05-11 SPQ451 ICN → PQC May 11, 02:45 UTCMay 11, 05:35 UTC2h 50m
2026-05-10 SPQ452 PQC → ICN May 10, 09:55 UTCMay 10, 21:35 UTC11h 40m
2026-05-10 SPQ510 PQC → TPE May 10, 06:55 UTCMay 10, 08:00 UTC1h 5m
2026-05-07 SPQ451 ICN → PQC May 7, 04:15 UTCMay 7, 07:15 UTC3h 0m
2026-05-06 SPQ452 PQC → ICN May 6, 10:01 UTCMay 6, 21:20 UTC11h 19m
2026-05-06 SPQ510 PQC → TPE May 6, 06:55 UTCMay 6, 07:55 UTC1h 0m
2026-05-05 SPQ451 ICN → PQC May 5, 03:55 UTCMay 5, 06:55 UTC3h 0m
2026-05-04 SPQ452 PQC → ICN May 4, 18:30 UTCMay 4, 21:10 UTC2h 41m
2026-05-03 SPQ451 ICN → PQC May 3, 03:45 UTCMay 3, 07:05 UTC3h 20m
2026-05-02 SPQ452 PQC → ICN May 2, 09:45 UTCMay 2, 20:55 UTC11h 10m
2026-05-02 SPQ510 PQC → TPE May 2, 06:45 UTCMay 2, 07:55 UTC1h 10m
2026-05-01 SPQ451 ICN → PQC May 1, 03:45 UTCMay 1, 06:25 UTC2h 40m
2026-04-30 SPQ452 PQC → ICN Apr 30, 10:05 UTCApr 30, 21:00 UTC10h 55m
2026-04-30 SPQ510 PQC → TPE Apr 30, 06:45 UTCApr 30, 07:45 UTC1h 0m
2026-04-29 SPQ451 ICN → PQC Apr 29, 04:05 UTCApr 29, 06:59 UTC2h 55m
2026-04-28 SPQ452 PQC → ICN Apr 28, 09:40 UTCApr 28, 21:10 UTC11h 30m
2026-04-28 SPQ510 PQC → TPE Apr 28, 06:40 UTCApr 28, 07:50 UTC1h 10m
2026-04-27 SPQ451 ICN → PQC Apr 27, 03:45 UTCApr 27, 06:50 UTC3h 5m
2026-04-26 SPQ452 PQC → ICN Apr 26, 09:50 UTCApr 26, 21:10 UTC11h 20m
2026-04-26 SPQ510 PQC → TPE Apr 26, 04:55 UTCApr 26, 08:00 UTC3h 5m
2026-04-25 SPQ1978 PQC → SGN Apr 25, 11:50 UTCApr 25, 12:15 UTC25m
2026-04-25 SPQ2965 DAD → PQC Apr 25, 07:10 UTCApr 25, 10:15 UTC3h 5m
2026-04-25 SPQ1969 SGN → PQC Apr 25, 05:10 UTCApr 25, 05:25 UTC15m
2026-04-25 SPQ821 HAN → SGN Apr 25, 03:30 UTCApr 25, 03:40 UTC10m
2026-04-24 SPQ804 SGN → HAN Apr 24, 22:50 UTCApr 24, 23:00 UTC10m
2026-04-24 SPQ1978 PQC → SGN Apr 24, 11:45 UTCApr 24, 12:10 UTC25m
2026-04-24 SPQ2966 PQC → DAD Apr 24, 07:00 UTCApr 24, 10:05 UTC3h 5m
2026-04-24 SPQ1969 SGN → PQC Apr 24, 05:05 UTCApr 24, 05:15 UTC10m
2026-04-24 SPQ961 DAD → SGN Apr 24, 03:25 UTCApr 24, 03:40 UTC15m
2026-04-24 SPQ956 SGN → DAD Apr 24, 00:15 UTCApr 24, 00:25 UTC10m
2026-04-23 SPQ873 - Apr 23, 15:20 UTCApr 23, 15:30 UTC10m
2026-04-23 SPQ451 ICN → PQC Apr 23, 03:40 UTCApr 23, 08:40 UTC5h 0m
2026-04-22 SPQ450 PQC → ICN Apr 22, 09:50 UTCApr 23, 00:35 UTC14h 45m
2026-04-22 SPQ510 PQC → TPE Apr 22, 05:05 UTCApr 22, 08:15 UTC3h 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 VN-A284 page for operator, model, and routing details .

Mode-S 88821C frequently asked

What is Mode-S code 88821C?
88821C is an ICAO 24-bit transponder address. Allocated to Vietnam. Assigned to VN-A284.
Where is Mode-S 88821C registered?
Mode-S code 88821C is allocated to Vietnam (VN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 88821C broadcasting right now?
No active broadcast right now. Last signal was 22m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 88821C, octal 42101034, decimal 8,946,204.
What flights does 88821C operate?
Mode-S 88821C has broadcast 20 distinct callsigns, including SPQ451, SPQ510, SPQ452, SPQ450, SPQ511.