Apparatus

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sensors Mode-S transponder

8881A1

ICAO 24-bit transponder address · allocated to Vietnam

Currently assigned to VN-A596 · AIRBUS A-320neo

Hex
8881A1
Octal
42100641
Decimal
8,946,081
Country
VN
Tail
VN-A596
Type
A20N
No current signal · last broadcast 3h ago
Flights observed
34
Distinct callsigns
19
Country
VN
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 8881A1.

Country allocation

The ICAO 24-bit address 8881A1 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 19 distinct

Callsign Airline Flights Last seen
BAV136 Bay Aviation Ltd 3 2026-06-02
BAV135 Bay Aviation Ltd 3 2026-06-02
BAV101 Bay Aviation Ltd 3 2026-06-02
BAV273 Bay Aviation Ltd 2 2026-06-02
BAV262 - 2 2026-04-19
BAV204 Bay Aviation Ltd 2 2026-04-19
BAV201 Bay Aviation Ltd 2 2026-06-01
BAV150 Bay Aviation Ltd 2 2026-04-19
BAV147 Bay Aviation Ltd 2 2026-06-02
BAV1415 Bay Aviation Ltd 2 2026-05-31
BAV1124 Bay Aviation Ltd 2 2026-04-20
BAV103 Bay Aviation Ltd 2 2026-05-30
BAV802 - 1 2026-06-03
BAV801 - 1 2026-06-03
BAV202 Bay Aviation Ltd 1 2026-04-23
BAV1416 Bay Aviation Ltd 1 2026-05-27
BAV1215 Bay Aviation Ltd 1 2026-05-30
BAV1214 Bay Aviation Ltd 1 2026-05-28
BAV104 Bay Aviation Ltd 1 2026-05-28

Recent flights last 34

DateFlightRouteTakeoffLandingDuration
2026-06-03 BAV801 - Jun 3, 08:20 UTCJun 3, 08:40 UTC20m
2026-06-03 BAV802 - Jun 3, 03:35 UTCJun 3, 04:00 UTC25m
2026-06-02 BAV101 HAN → DAD Jun 2, 22:45 UTCJun 3, 01:40 UTC2h 55m
2026-06-02 BAV273 HAN → SGN Jun 2, 14:05 UTCJun 2, 18:35 UTC4h 30m
2026-06-02 BAV147 HAN → DAD Jun 2, 09:45 UTCJun 2, 12:25 UTC2h 40m
2026-06-02 BAV136 DAD → HAN Jun 2, 07:50 UTCJun 2, 08:05 UTC15m
2026-06-02 BAV135 HAN → DAD Jun 2, 05:05 UTCJun 2, 05:25 UTC20m
2026-06-01 BAV201 HAN → SGN Jun 1, 22:55 UTCJun 2, 03:30 UTC4h 35m
2026-06-01 BAV147 HAN → DAD Jun 1, 09:45 UTCJun 1, 15:45 UTC6h 0m
2026-06-01 BAV136 DAD → HAN Jun 1, 05:10 UTCJun 1, 08:10 UTC3h 0m
2026-05-31 BAV201 HAN → SGN May 31, 23:00 UTCJun 1, 03:25 UTC4h 25m
2026-05-31 BAV1415 HAN → CXR May 31, 09:25 UTCMay 31, 13:20 UTC3h 55m
2026-05-30 BAV101 HAN → DAD May 30, 22:50 UTCMay 30, 23:15 UTC25m
2026-05-30 BAV273 HAN → SGN May 30, 14:05 UTCMay 30, 18:30 UTC4h 25m
2026-05-30 BAV1215 HAN → UIH May 30, 09:30 UTCMay 30, 12:50 UTC3h 20m
2026-05-30 BAV135 HAN → DAD May 30, 05:15 UTCMay 30, 08:00 UTC2h 45m
2026-05-30 BAV103 HAN → DAD May 30, 01:05 UTCMay 30, 03:55 UTC2h 50m
2026-05-29 BAV1415 HAN → CXR May 29, 09:20 UTCMay 29, 13:10 UTC3h 50m
2026-05-28 BAV101 HAN → DAD May 28, 22:55 UTCMay 29, 01:35 UTC2h 40m
2026-05-28 BAV1214 UIH → HAN May 28, 10:00 UTCMay 28, 13:40 UTC3h 40m
2026-05-28 BAV136 DAD → HAN May 28, 07:45 UTCMay 28, 08:00 UTC15m
2026-05-28 BAV135 HAN → DAD May 28, 05:10 UTCMay 28, 05:40 UTC30m
2026-05-28 BAV104 DAD → HAN May 28, 03:30 UTCMay 28, 03:45 UTC15m
2026-05-28 BAV103 HAN → DAD May 28, 01:00 UTCMay 28, 01:25 UTC25m
2026-05-27 BAV1416 CXR → HAN May 27, 13:05 UTCMay 27, 13:25 UTC20m
2026-04-23 BAV202 SGN → HAN Apr 23, 23:45 UTCApr 23, 23:55 UTC10m
2026-04-20 BAV1124 SGN → UIH Apr 20, 11:40 UTCApr 20, 11:50 UTC10m
2026-04-19 BAV150 SGN → DAD Apr 19, 23:10 UTCApr 19, 23:20 UTC10m
2026-04-19 BAV262 - Apr 19, 17:05 UTCApr 19, 17:15 UTC10m
2026-04-19 BAV204 SGN → HAN Apr 19, 00:25 UTCApr 19, 00:35 UTC10m
2026-04-18 BAV150 SGN → DAD Apr 18, 03:35 UTCApr 18, 03:45 UTC10m
2026-04-17 BAV262 - Apr 17, 21:45 UTCApr 17, 21:55 UTC10m
2026-04-17 BAV1124 - Apr 17, 13:40 UTCApr 17, 13:50 UTC10m
2026-04-17 BAV204 SGN → HAN Apr 17, 00:30 UTCApr 17, 00:40 UTC10m

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-A596 page for operator, model, and routing details .

Mode-S 8881A1 frequently asked

What is Mode-S code 8881A1?
8881A1 is an ICAO 24-bit transponder address. Allocated to Vietnam. Assigned to VN-A596.
Where is Mode-S 8881A1 registered?
Mode-S code 8881A1 is allocated to Vietnam (VN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8881A1 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 8881A1, octal 42100641, decimal 8,946,081.
What flights does 8881A1 operate?
Mode-S 8881A1 has broadcast 19 distinct callsigns, including BAV136, BAV135, BAV101, BAV273, BAV262.