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 3h ago
Flights observed
177
Distinct callsigns
20
Country
VN
Last broadcast
3h 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 - 29 2026-07-17
SPQ451 - 28 2026-07-18
SPQ502 - 13 2026-07-11
SPQ510 Servicios Aereos Palenque 11 2026-06-11
SPQ879 Servicios Aereos Palenque 9 2026-07-15
SPQ501 - 9 2026-07-11
SPQ805 Servicios Aereos Palenque 7 2026-06-29
SPQ1208 - 6 2026-07-15
SPQ943 Servicios Aereos Palenque 5 2026-07-12
SPQ1230 - 5 2026-07-12
SPQ1209 - 5 2026-07-15
SPQ811 - 4 2026-07-16
SPQ802 - 4 2026-07-05
SPQ809 Servicios Aereos Palenque 3 2026-06-20
SPQ942 Servicios Aereos Palenque 2 2026-06-25
SPQ930 - 2 2026-07-16
SPQ894 Servicios Aereos Palenque 2 2026-06-27
SPQ876 Servicios Aereos Palenque 2 2026-04-25
SPQ1244 Servicios Aereos Palenque 2 2026-07-01
SPQ1227 - 2 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 SPQ451 - Jul 18, 03:30 UTCJul 18, 06:10 UTC2h 40m
2026-07-17 SPQ452 - Jul 17, 20:55 UTCJul 17, 21:34 UTC40m
2026-07-17 SPQ452 - Jul 17, 12:35 UTCJul 17, 20:44 UTC8h 10m
2026-07-17 SPQ451 - Jul 17, 02:54 UTCJul 17, 05:35 UTC2h 40m
2026-07-16 SPQ452 - Jul 16, 12:14 UTCJul 16, 21:35 UTC9h 20m
2026-07-16 SPQ930 - Jul 16, 10:29 UTCJul 16, 10:40 UTC10m
2026-07-16 SPQ811 - Jul 16, 00:05 UTCJul 16, 00:20 UTC15m
2026-07-15 SPQ879 HAN → SGN Jul 15, 13:55 UTCJul 15, 14:10 UTC15m
2026-07-15 SPQ1227 - Jul 15, 07:45 UTCJul 15, 12:05 UTC4h 20m
2026-07-15 SPQ1208 - Jul 15, 05:40 UTCJul 15, 05:50 UTC10m
2026-07-15 SPQ1209 - Jul 15, 01:40 UTCJul 15, 01:55 UTC15m
2026-07-14 SPQ883 HAN → SGN Jul 14, 16:20 UTCJul 14, 16:35 UTC15m
2026-07-14 SPQ451 - Jul 14, 03:00 UTCJul 14, 14:50 UTC11h 50m
2026-07-13 SPQ452 - Jul 13, 18:40 UTCJul 13, 21:30 UTC2h 50m
2026-07-13 SPQ1245 HAN → PQC Jul 13, 13:15 UTCJul 13, 13:30 UTC15m
2026-07-13 SPQ1225 - Jul 13, 07:25 UTCJul 13, 07:35 UTC10m
2026-07-13 SPQ1208 - Jul 13, 05:31 UTCJul 13, 05:45 UTC15m
2026-07-13 SPQ1209 - Jul 13, 01:20 UTCJul 13, 01:35 UTC15m
2026-07-12 SPQ893 HAN → SGN Jul 12, 18:50 UTCJul 12, 19:05 UTC15m
2026-07-12 SPQ943 HAN → DAD Jul 12, 14:30 UTCJul 12, 14:45 UTC15m
2026-07-12 SPQ1230 - Jul 12, 07:25 UTCJul 12, 13:01 UTC5h 35m
2026-07-12 SPQ1209 - Jul 12, 01:25 UTCJul 12, 01:40 UTC15m
2026-07-11 SPQ884 - Jul 11, 17:15 UTCJul 11, 17:25 UTC10m
2026-07-11 SPQ501 - Jul 11, 09:05 UTCJul 11, 09:20 UTC15m
2026-07-11 SPQ502 - Jul 11, 07:25 UTCJul 11, 07:45 UTC20m
2026-07-11 SPQ811 - Jul 11, 00:10 UTCJul 11, 00:20 UTC10m
2026-07-10 SPQ946 - Jul 10, 16:05 UTCJul 10, 16:15 UTC10m
2026-07-10 SPQ943 HAN → DAD Jul 10, 13:25 UTCJul 10, 13:45 UTC20m
2026-07-10 SPQ1230 - Jul 10, 11:25 UTCJul 10, 11:35 UTC10m
2026-07-10 SPQ451 - Jul 10, 03:15 UTCJul 10, 05:40 UTC2h 25m
2026-07-09 SPQ452 - Jul 9, 12:55 UTCJul 9, 21:25 UTC8h 30m
2026-07-09 SPQ930 - Jul 9, 10:10 UTCJul 9, 10:55 UTC45m
2026-07-08 SPQ945 - Jul 8, 18:10 UTCJul 8, 20:50 UTC2h 40m
2026-07-08 SPQ9285 - Jul 8, 13:45 UTCJul 8, 16:45 UTC3h 0m
2026-07-08 SPQ1227 - Jul 8, 07:45 UTCJul 8, 08:05 UTC20m
2026-07-08 SPQ1208 - Jul 8, 01:25 UTCJul 8, 06:35 UTC5h 10m
2026-07-07 SPQ879 HAN → SGN Jul 7, 13:10 UTCJul 8, 00:00 UTC10h 50m
2026-07-07 SPQ1230 - Jul 7, 11:30 UTCJul 7, 11:45 UTC15m
2026-07-07 SPQ451 - Jul 7, 02:40 UTCJul 7, 05:30 UTC2h 50m
2026-07-06 SPQ452 - Jul 6, 07:50 UTCJul 6, 21:15 UTC13h 25m
2026-07-06 SPQ1209 - Jul 6, 01:30 UTCJul 6, 05:55 UTC4h 25m
2026-07-05 SPQ802 - Jul 5, 23:45 UTCJul 6, 00:00 UTC15m
2026-07-05 SPQ451 - Jul 5, 03:05 UTCJul 5, 05:50 UTC2h 45m
2026-07-04 SPQ452 - Jul 4, 12:50 UTCJul 4, 21:25 UTC8h 35m
2026-07-04 SPQ1224 - Jul 4, 06:45 UTCJul 4, 11:40 UTC4h 55m
2026-07-04 SPQ1206 - Jul 4, 00:45 UTCJul 4, 05:35 UTC4h 50m
2026-07-03 SPQ1229 - Jul 3, 07:45 UTCJul 3, 18:15 UTC10h 30m
2026-07-03 SPQ1209 - Jul 3, 01:35 UTCJul 3, 05:45 UTC4h 10m
2026-07-02 SPQ802 - Jul 2, 16:30 UTCJul 3, 00:15 UTC7h 45m
2026-07-02 SPQ1240 - Jul 2, 10:40 UTCJul 2, 15:15 UTC4h 35m

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 3h 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, SPQ502, SPQ510, SPQ879.