Apparatus

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sensors Mode-S transponder

8881AB

ICAO 24-bit transponder address · allocated to Vietnam

Currently assigned to VN-A523 · AIRBUS A-321neo

Hex
8881AB
Octal
42100653
Decimal
8,946,091
Country
VN
Tail
VN-A523
Type
A21N
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
261
Distinct callsigns
20
Country
VN
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 8881AB.

Country allocation

The ICAO 24-bit address 8881AB 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
VJC822 VietJet Air 22 2026-07-25
VJC821 VietJet Air 22 2026-07-26
VJC820 - 20 2026-07-22
VJC823 VietJet Air 17 2026-07-26
VJC91 VietJet Air 12 2026-07-24
VJC933 - 11 2026-06-16
VJC92 VietJet Air 11 2026-07-24
VJC932 - 8 2026-06-15
VJC883 VietJet Air 7 2026-05-14
VJC877 - 7 2026-07-03
VJC876 - 7 2026-07-03
VJC947 VietJet Air 6 2026-04-20
VJC860 - 5 2026-07-15
VJC1804 VietJet Air 5 2026-05-16
VJC946 VietJet Air 4 2026-04-18
VJC934 - 4 2026-06-15
VJC948 - 3 2026-04-13
VJC935 VietJet Air 3 2026-06-15
VJC885 - 3 2026-07-08
VJC884 VietJet Air 3 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 VJC821 HND → SGN Jul 26, 19:55 UTCJul 26, 22:45 UTC2h 50m
2026-07-26 VJC823 NRT → SGN Jul 26, 00:55 UTCJul 26, 18:15 UTC17h 21m
2026-07-25 VJC822 SGN → NRT Jul 25, 02:50 UTCJul 25, 22:45 UTC19h 55m
2026-07-25 VJC822 SGN → NRT Jul 25, 02:35 UTCJul 25, 22:45 UTC20h 10m
2026-07-24 VJC91 SGN → PER Jul 24, 07:40 UTCJul 25, 01:10 UTC17h 30m
2026-07-24 VJC92 PER → SGN Jul 24, 02:50 UTCJul 25, 01:10 UTC22h 20m
2026-07-23 VJC854 CGK → SGN Jul 23, 07:40 UTCJul 24, 00:35 UTC16h 55m
2026-07-23 VJC855 SGN → CGK Jul 23, 05:30 UTCJul 23, 05:50 UTC20m
2026-07-22 VJC821 - Jul 22, 17:15 UTCJul 22, 20:40 UTC3h 25m
2026-07-22 VJC820 KHH → HND Jul 22, 05:00 UTCJul 22, 15:45 UTC10h 45m
2026-07-21 VJC821 HND → KHH Jul 21, 17:35 UTCJul 22, 03:50 UTC10h 15m
2026-07-20 VJC820 - Jul 20, 20:50 UTCJul 21, 15:55 UTC19h 5m
2026-07-20 VJC820 - Jul 20, 19:25 UTCJul 21, 15:55 UTC20h 29m
2026-07-20 VJC821 HND → HND Jul 20, 17:35 UTCJul 21, 15:55 UTC22h 20m
2026-07-20 VJC820 - Jul 20, 06:10 UTCJul 20, 15:40 UTC9h 30m
2026-07-20 VJC274 - Jul 20, 05:00 UTCJul 20, 05:10 UTC10m
2026-07-19 VJC821 - Jul 19, 18:00 UTCJul 19, 21:30 UTC3h 30m
2026-07-19 VJC820 - Jul 19, 02:35 UTCJul 19, 16:25 UTC13h 50m
2026-07-18 VJC843 - Jul 18, 12:35 UTCJul 19, 00:45 UTC12h 10m
2026-07-18 VJC823 NRT → SGN Jul 18, 00:39 UTCJul 18, 11:00 UTC10h 21m
2026-07-17 VJC822 - Jul 17, 11:35 UTCJul 17, 23:10 UTC11h 35m
2026-07-17 VJC983 PQC → SIN Jul 17, 09:35 UTCJul 17, 10:15 UTC40m
2026-07-17 VJC984 - Jul 17, 05:20 UTCJul 17, 05:45 UTC25m
2026-07-17 VJC811 - Jul 17, 03:39 UTCJul 17, 03:55 UTC15m
2026-07-16 VJC821 - Jul 16, 17:30 UTCJul 16, 20:49 UTC3h 20m
2026-07-16 VJC820 - Jul 16, 12:14 UTCJul 16, 15:49 UTC3h 35m
2026-07-16 VJC804 - Jul 16, 07:10 UTCJul 16, 07:25 UTC15m
2026-07-16 VJC803 - Jul 16, 05:15 UTCJul 16, 05:35 UTC20m
2026-07-16 VJC271 - Jul 16, 01:30 UTCJul 16, 01:40 UTC10m
2026-07-16 VJC270 - Jul 16, 00:25 UTCJul 16, 00:35 UTC10m
2026-07-15 VJC861 - Jul 15, 12:50 UTCJul 15, 15:40 UTC2h 50m
2026-07-15 VJC860 - Jul 15, 08:05 UTCJul 15, 10:55 UTC2h 50m
2026-07-14 VJC157 HAN → SGN Jul 14, 13:00 UTCJul 14, 13:10 UTC10m
2026-07-14 VJC433 - Jul 14, 06:40 UTCJul 14, 06:55 UTC15m
2026-07-14 VJC939 - Jul 14, 00:45 UTCJul 14, 01:45 UTC1h 0m
2026-07-13 VJC938 - Jul 13, 18:35 UTCJul 13, 22:55 UTC4h 20m
2026-07-13 VJC561 HAN → HUI Jul 13, 13:10 UTCJul 13, 13:20 UTC10m
2026-07-13 VJC423 - Jul 13, 09:00 UTCJul 13, 09:15 UTC15m
2026-07-13 VJC921 - Jul 13, 02:45 UTCJul 13, 03:50 UTC1h 5m
2026-07-12 VJC920 - Jul 12, 21:05 UTCJul 13, 01:15 UTC4h 10m
2026-07-12 VJC157 HAN → SGN Jul 12, 14:40 UTCJul 12, 14:55 UTC15m
2026-07-11 VJC823 - Jul 11, 01:00 UTCJul 11, 05:05 UTC4h 5m
2026-07-10 VJC822 - Jul 10, 19:40 UTCJul 10, 23:15 UTC3h 35m
2026-07-10 VJC193 - Jul 10, 12:35 UTCJul 10, 12:50 UTC15m
2026-07-10 VJC142 - Jul 10, 10:45 UTCJul 10, 11:10 UTC25m
2026-07-10 VJC135 - Jul 10, 05:55 UTCJul 10, 06:10 UTC15m
2026-07-09 VJC425 - Jul 9, 04:45 UTCJul 9, 04:55 UTC10m
2026-07-08 VJC150 SGN → HAN Jul 8, 16:55 UTCJul 8, 17:05 UTC10m
2026-07-08 VJC885 - Jul 8, 04:40 UTCJul 8, 05:00 UTC20m
2026-07-07 VJC886 - Jul 7, 14:05 UTCJul 8, 03:35 UTC13h 30m

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-A523 page for operator, model, and routing details .

Mode-S 8881AB frequently asked

What is Mode-S code 8881AB?
8881AB is an ICAO 24-bit transponder address. Allocated to Vietnam. Assigned to VN-A523.
Where is Mode-S 8881AB registered?
Mode-S code 8881AB is allocated to Vietnam (VN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8881AB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8881AB, octal 42100653, decimal 8,946,091.
What flights does 8881AB operate?
Mode-S 8881AB has broadcast 20 distinct callsigns, including VJC822, VJC821, VJC820, VJC823, VJC91.